501. Coal mines in Jharkhand are located at:

A. Jharia
B. Jamshedpur
C. Ranchi
D. Lohardanga
✅ The correct answer is option A.
Coal mines in Jharkhand are located at Jharia. In Jharkhand, Jharia in Dhanbad is the Coal Capital of India apart from this You will find the Coal mines in Girdih,Ramgarh,Dumka and Bokaro. India’s Largest Coalfield is in Raniganj,West Bengal.

502. The chief of the Army staff is assisted by

A. Vice-chief of the Army Staff
B. Principal staff officers such as Deputy Chief, Adjutant General, Military Secretary
C. both (A) and (B)
D. None of the above
✅ The correct answer is option C.
The chief of the Army staff is assisted by Vice-chief of the Army Staff and Principal staff officers such as Deputy Chief, Adjutant General, Military Secretary.

503. Which body of UNO carries on the function of the UNO with regard to international, economic, social, cultural, education, wealth and related matters?

A. General Assembly
B. Security Council
C. The Economic and Social Council
D. Trusteeship Council
✅ The correct answer is option C.
The Economic and Social Council body of UNO carries on the function of the UNO with regard to international, economic, social, cultural, education, wealth and related matters.

504. During World War I Germany was defeated in the Battle of Verdun on the western front and Romania declared war on the eastern front in the year

A. 1914 AD
B. 1915 AD
C. 1916 AD
D. 1917 AD
✅ The correct answer is option C.
During World War I Germany was defeated in the Battle of Verdun on the western front and Romania declared war on the eastern front in the year 1916 AD. Germany signed an armistice (an agreement for peace and no more fighting) that had been prepared by Britain and France. At the start of 1918, Germany was in a strong position and expected to win the war.

505. The main reserves of phosphorus in the biosphere is in the

A. hydrosphere
B. troposphere
C. lithosphere
D. atmosphere
✅ The correct answer is option C.
The main reserves of phosphorus in the biosphere is in the lithosphere. The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based compounds are usually solids at the typical ranges of temperature and pressure found on Earth.

506. The life history of human malaria parasite in Anopheles was first described by

A. Partrick Manson
B. Laveran
C. Ronald Ross
D. Richard Pfeiffer
✅ The correct answer is option C.
The life history of human malaria parasite in Anopheles was first described by Ronald Ross. On 20 August 1897, in Secunderabad, Ross made his landmark discovery. While dissecting the stomach tissue of an anopheline mosquito fed four days previously on a malarious patient, he found the malaria parasite and went on to prove the role of Anopheles mosquitoes in the transmission of malaria parasites in humans.

507. The Himalayan Mountaineering Institute is located in

A. Dehradun
B. Darjeeling
C. Uttarkashi
D. Shillong
✅ The correct answer is option B.
The Himalayan Mountaineering Institute is located in Darjeeling. The Himalayan Mountaineering Institute (HMI) is one of the premier mountaineering institutes in the world. Founded on November 4th, 1954 by none other than Pandit Jawaharlal Nehru, the first Prime Minister of India, the institute is located in the picturesque hill station of Darjeeling.

508. How many times has Brazil won the World Cup Football Championship?

A. Once
B. Twice
C. Four times
D. Five times
✅ The correct answer is option D.
Brazil have won five times, and they are the only team to have played in every tournament. The other World Cup winners are Germany and Italy, with four titles each; Argentina, France and inaugural winner Uruguay, with two titles each; and England and Spain with one title each.