Bulk of carbon dioxide released from body tissues into the blood is present as
bicarbonate in blood plasma and
free in blood plasma
70% carbamino -haemoglobin and 30% as bicarbonate
carbamino - haemoglobin in
About 20-25% of carbon dioxide is carried by RBCs as carbamino-haemoglobin, about 7% as dissolved state in plasma and maximum amount of carbon dioxide (nearly 70%) as bicarbonates in blood plasma and RBCs. Thus, the correct answer is option a.