Match the following and mark the correct option
`{:("Column I", " ""Column II"),("Fast muscle fibres",i."Myoglobin"),("Slow muscle fibres",ii."Lactic acid"),("Actin filament",iii."Contractile unit"),("Sarcomere",iv. "I-band"):}`

Options

A. `{:(A,B,C,D),(1,2,4,3):}`
B. `{:(A,B,C,D),(2,1,3,4):}`
C. `{:(A,B,C,D),(2,1,4,3):}`
D. `{:(A,B,C,D),(3,2,4,1):}`

Explanation

To solve the matching question, we will analyze each item in Column I and find the correct corresponding item in Column II.

### Step-by-Step Solution:

1. **Fast Muscle Fibres**:
- Fast muscle fibers are known for their ability to produce energy quickly, primarily through anaerobic respiration, which leads to the production of lactic acid.
- **Match**: Fast muscle fibres → ii. Lactic acid

2. **Slow Muscle Fibres**:
- Slow muscle fibers are adapted for endurance and use aerobic respiration, which requires oxygen. They contain a high amount of myoglobin, which helps in storing oxygen for ATP production.
- **Match**: Slow muscle fibres → i. Myoglobin

3. **Actin Filament**:
- Actin filaments are part of the muscle structure and are associated with the light bands (I-band) in the sarcomere, which is the basic contractile unit of muscle.
- **Match**: Actin filament → iv. I-band

4. **Sarcomere**:
- The sarcomere is the basic contractile unit of muscle tissue, composed of actin and myosin filaments.
- **Match**: Sarcomere → iii. Contractile unit

### Final Matches:
- Fast muscle fibres → ii. Lactic acid
- Slow muscle fibres → i. Myoglobin
- Actin filament → iv. I-band
- Sarcomere → iii. Contractile unit

### Correct Option:
Based on the matches, the correct option is:
- A → 2
- B → 1
- C → 4
- D → 3