Match the following columns
`{:("Column I","Column II"),("a. Cisacontic acid","I. 2-carbon"),("b. Fumaric acid","II. 3-carbon"),("c. 2-PGA","III. 4-carbon"),("d. Acetyl CoA","IV. 6-carbon"):}`

Options

A. a-I, b-II, c-III, d-IV
B. a-II, b-III, c-I, d-IV
C. a-IV, b-III, c-I, d-II
D. a-IV, b-III, c-II, d-I

Answer

To solve the matching question, we need to identify the number of carbon atoms in each compound listed in Column I and then match them with the corresponding number of carbon atoms in Column II.

### Step-by-Step Solution:

1. **Identify the number of carbons in Cisacontic acid:**
- Cisacontic acid is a 6-carbon compound.
- **Match:** This corresponds to IV (6-carbon).

2. **Identify the number of carbons in Fumaric acid:**
- Fumaric acid is a 4-carbon compound.
- **Match:** This corresponds to III (4-carbon).

3. **Identify the number of carbons in 2-PGA (2-phosphoglycerate):**
- 2-PGA has 3 carbon atoms.
- **Match:** This corresponds to II (3-carbon).

4. **Identify the number of carbons in Acetyl CoA:**
- Acetyl CoA is a 2-carbon compound.
- **Match:** This corresponds to I (2-carbon).

### Final Matches:
- a. Cisacontic acid → IV (6-carbon)
- b. Fumaric acid → III (4-carbon)
- c. 2-PGA → II (3-carbon)
- d. Acetyl CoA → I (2-carbon)

### Answer:
- a → IV
- b → III
- c → II
- d → I