Read the following matches
(i) Zinc - Activator of catalase
(ii) Calcium - Required during formation of mitotic spindle
(iii) Sulphur - Constituent of ferredoxin
(iv) Chlorine - Essential for water- splitting reaction in photosynthesis
Which of these are correct

Options

A. (i), (ii) & (iii)
B. (ii), (iii) & (iv)
C. (iii) & (iv)
D. (i) & (ii)

Explanation

To determine which of the given matches are correct, we will analyze each match one by one.

### Step 1: Analyze the first match - Zinc - Activator of catalase
- Zinc is often associated with various enzymes, but it is not the activator of catalase. The correct activator for catalase is iron. Therefore, this match is **incorrect**.

### Step 2: Analyze the second match - Calcium - Required during formation of mitotic spindle
- Calcium plays a crucial role in various cellular processes, including the formation of the mitotic spindle during cell division. Therefore, this match is **correct**.

### Step 3: Analyze the third match - Sulphur - Constituent of ferredoxin
- Sulphur is indeed a constituent of ferredoxin, which is a protein that contains both iron and sulphur. Therefore, this match is **correct**.

### Step 4: Analyze the fourth match - Chlorine - Essential for water-splitting reaction in photosynthesis
- Chlorine is essential in the process of photolysis of water during photosynthesis, where water is split to release oxygen. Therefore, this match is **correct**.

### Conclusion:
After analyzing all four matches:
- The correct matches are:
- (ii) Calcium - Required during formation of mitotic spindle (Correct)
- (iii) Sulphur - Constituent of ferredoxin (Correct)
- (iv) Chlorine - Essential for water-splitting reaction in photosynthesis (Correct)

- The incorrect match is:
- (i) Zinc - Activator of catalase (Incorrect)

Thus, the correct options are 2, 3, and 4.

### Final Answer:
The correct matches are 2, 3, and 4.

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