Read the following statements and select the correct one
A. The `H^(+)` relased form carbonic acid combines with haemoglobin to form heamoglobinic acid
B. oxyheamoglobin of erthrocytes is alkaline
C. more than 70 % of carbon dioxide is transferred from tissues to the lungs in the form of carbamino compounds
D. in a healthy person , the haemoglobin content is more than 25 gms per 100 ml
