61. The most abundant element in Earth’s crust is: A. Silicon B. Oxygen C. Aluminium D. None of these ✅ The correct answer is option Oxygen.
62. The number of bones in the human body of an adult is approximately: A. 210 B. 250 C. 206 D. Not fixed ✅ The correct answer is option 206.
63. Dialysis is used for the trearment of : A. Kidney failure B. Heart Failure C. Brain Failure D. None of these ✅ The correct answer is option Kidney failure.
64. Unit Decible is measurement of: A. Electric Charge B. Intensity of sound C. Magnetic Flux D. Speed of Ship And Aircraft ✅ The correct answer is option Intensity of sound.
65. Malaria is a disease which affect the: A. Heart B. Lungs C. Spleen D. Kidney ✅ The correct answer is option Spleen.