Go through the following statements
(i) haemoglobin is 50% satruated at arund 40-50 mmHg
(ii) maternal haemolgobin has greater afinity for `O_(2)` as compared to fetal haemoglobin
(iii) olfactory epithelium of nose is called scheniderian membrane
(iv) the level of `CO_(2)` has stronger effect on regulation of breathing as compard to `O_(2)` level
which of these are correct ?
(a) i, iii & iv
(b) ii & iii
(c) i,ii & iii
(d) iii & iv

Options

A. I , iii & iv
B. ii & iii
C. I,ii & iii
D. iii & iv

Answer

D

Explanation

Hb is 50% saturated at 25-30 mm of Hg foetalHb has higher affinity for `O_(2)` as compared to maternal Hb