Human body compensates low oxygen availability at high altitudes by:

(A) increasing number of red blood cells
(B) decreasing the binding affinity of haemoglobin
(C) increasing the binding affinity of haemoglobin
(D) increasing breathing rate

Choose the correct answer from the options given below:

(A), (B) and (D) only

The correct answer is Option (3) → (A), (B) and (D) only

Some organisms possess adaptations that are physiological which allow them to respond quickly to a stressful situation. If you had ever been to any high altitude place (>3,500m Rohtang Pass near Manali and Mansarovar, in China occupied Tibet) you must have experienced what is called altitude sickness. Its symptoms include nausea, fatigue and heart palpitations. This is because in the low atmospheric pressure of high altitudes, the body does not get enough oxygen. But, gradually you get acclimatised and stop experiencing altitude sickness. The body compensates low oxygen availability by increasing red blood cell production, decreasing the binding affinity of hemoglobin and by increasing breathing rate. Many tribes live in the high altitude of Himalayas.