Molecular oxygen is carried in two way:
(1) bound to haemoglobin
(2) dissolved in plasma
Every 100 ml of oxygenated blood can deliver about 5ml of O2 to the tissue.
O2 is poorly soluble in H2O. So only 3% of the O2 is transported in dissolved form. About 97% of O2 is bind with haemoglobin
so the correct option is (A)

In each 100 ml of oxygenated blood, there are several components involved in the transport and distribution of oxygen and carbon dioxide. Let's break down the distribution of oxygen and carbon dioxide in the blood:

Oxygen Distribution:
a) 3% of O2 is dissolved in blood plasma:
- When oxygen enters the bloodstream from the lungs, a small portion of it dissolves directly into the blood plasma. This dissolved oxygen is readily available for diffusion across the capillary walls, allowing it to reach the tissues where it is needed.

b) 97% of O2 is bound to hemoglobin:
- The majority of oxygen in the blood is transported bound to a protein called hemoglobin. Oxygen has a high affinity for hemoglobin, and each molecule of hemoglobin can bind up to four oxygen molecules, forming a complex called oxyhemoglobin. This allows for efficient transportation of oxygen throughout the body.

Carbon Dioxide Distribution:
c) 7% of CO2 is dissolved in blood plasma:
- Carbon dioxide, produced as a waste product by cells, can also dissolve directly in the blood plasma. This dissolved CO2 can be transported back to the lungs to be eliminated from the body.

d) 23% of CO2 is bound to hemoglobin:
- Similar to oxygen, a portion of carbon dioxide binds to hemoglobin. Carbon dioxide binds to a different site on hemoglobin than oxygen, forming a complex called carbaminohemoglobin. This binding helps in the transport of carbon dioxide back to the lungs.

Summary:
- Oxygen distribution in 100 ml of oxygenated blood:
- 3% of O2 is dissolved in blood plasma (a)
- 97% of O2 is bound to hemoglobin (b)

- Carbon dioxide distribution in 100 ml of oxygenated blood:
- 7% of CO2 is dissolved in blood plasma (c)
- 23% of CO2 is bound to hemoglobin (d)

Answer: The correct option is D) a and d.