Which of the following statement is true ?
(a)CO form stable compound with Hb and impede transport of `O_(2)`
(b) `SO_(2)` is a water soluble compound and does not impede
transport of `O_(2)`
(c ) Amount of `Cl^(–)` is same in both pulmonary veins and coronary artery.

Options

A. a and c
B. a and b
C. a, b and c
D. b and c

Answer

To determine which of the statements is true, we will analyze each statement one by one.

1. **Statement (a)**: "CO forms a stable compound with Hb and impede transport of O₂."
- Carbon monoxide (CO) binds with hemoglobin (Hb) to form carboxyhemoglobin, which is a very stable compound. This binding reduces the availability of hemoglobin to bind with oxygen (O₂), thereby impeding the transport of oxygen in the blood. Therefore, this statement is **true**.

2. **Statement (b)**: "SO₂ is a water soluble compound and does not impede transport of O₂."
- Sulfur dioxide (SO₂) is indeed a water-soluble compound. However, it does not form a stable compound with hemoglobin like carbon monoxide does. As a result, it does not interfere with the transport of oxygen. Thus, this statement is also **true**.

3. **Statement (c)**: "Amount of Cl⁻ is the same in both pulmonary veins and coronary artery."
- Chloride ions (Cl⁻) are present in the blood, and their concentration can vary depending on several factors, including the physiological state of the body. However, in general, the amount of chloride ions is relatively consistent in the blood circulation, including in the pulmonary veins and coronary arteries. Therefore, this statement is also **true**.

After analyzing all three statements, we find that all of them are correct.

**Final Answer**: All the statements (A, B, and C) are true.