A) Oxygen
B) Nitrogen
C) Methane
Related MCQs:
- Which mammal can fly?
- A set of questions asked and filled in by the interviewer in a face-to-face situation with another person is called?
- Birds that fly at high altitudes need an especially efficient respiratory system because?
- A mug filled with half of the liquid weighs 700 gm. When it is empty, it weighs 200 gm. How much will it weigh when 3/4 of it is full of liquid?