Consider the given statements and select correct statement for transport of oxygen
(a) seventy percent of oxygen is carried as bicarbonates
(b) about ninty seven percent of oxygen is transported by RBCs in blood
(c) it is carried by haemoglobin as carb-amino haemoglobin

Options

A. (1)a.,b
B. (2)b,c
C. (3)onlyb
D. (4)only c

Answer

To determine the correct statement regarding the transport of oxygen, let's analyze each option step by step.

### Step 1: Evaluate Statement (a)
- **Statement (a)** claims that "seventy percent of oxygen is carried as bicarbonates."
- **Analysis**: This statement is incorrect. While bicarbonate is important for carbon dioxide transport, oxygen is not primarily transported in this form. Most oxygen is carried by hemoglobin in red blood cells.

**Hint**: Remember that bicarbonate primarily relates to carbon dioxide transport, not oxygen.

### Step 2: Evaluate Statement (b)
- **Statement (b)** states that "about ninety-seven percent of oxygen is transported by RBCs in blood."
- **Analysis**: This statement is correct. Approximately 97% of oxygen in the blood is indeed carried by red blood cells (RBCs) bound to hemoglobin.

**Hint**: Consider the role of red blood cells and hemoglobin in oxygen transport.

### Step 3: Evaluate Statement (c)
- **Statement (c)** claims that "it is carried by hemoglobin as carbaminohemoglobin."
- **Analysis**: This statement is incorrect. Hemoglobin carries oxygen as oxyhemoglobin, not carbaminohemoglobin. Carbaminohemoglobin refers to hemoglobin that is bound to carbon dioxide, not oxygen.

**Hint**: Differentiate between the forms of hemoglobin based on what they are carrying (oxygen vs. carbon dioxide).

### Conclusion
After evaluating all three statements:
- Statement (a) is false.
- Statement (b) is true.
- Statement (c) is false.

Thus, the correct answer is **(b) about ninety-seven percent of oxygen is transported by RBCs in blood.**