1373. Correct about right and left main bronchi is_______________?

A. Right bronchus is more vertical and broader than the left
B. Right bronchus is more vertical and has a narrow caliber than the left
C. Left bronchus is more vertical and broader than right
D. Left bronchus is more vertical and narrower than right
✅ The correct answer is option A. Right bronchus is more vertical and broader than the left.

1380. Which of the following statement is correct_________________?

A. In cross sections enamel rods appear hexagonal and resembles fish scales
B. The bodies of rods are near occlusal and incisal surfaces, where as the tails point cervically
C. The apatite crystals are parallel to bodies and deviate 65° from the tails
D. All of the above
✅ The correct answer is option D. All of the above.