Read the following matches and choose correct option
(i) Clostridium - Food poisoning botulinum
(ii) Xanthomona sesculenti-Bacterial blight of rice
(iii) Nitrosomonas - Oxidises ammonia to nitrites

Options

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

Answer

To solve the question regarding the matches of bacteria with their respective diseases or functions, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyzing Clostridium - Food poisoning botulinum:**
- Clostridium botulinum is indeed known for causing botulism, a type of food poisoning. This bacterium is anaerobic and often associated with improperly canned or preserved foods.
- **Conclusion:** This match is correct.

2. **Analyzing Xanthomonas esculenti - Bacterial blight of rice:**
- The bacterial blight of rice is caused by Xanthomonas oryzae, not Xanthomonas esculenti. Therefore, this match is incorrect.
- **Conclusion:** This match is incorrect.

3. **Analyzing Nitrosomonas - Oxidizes ammonia to nitrites:**
- Nitrosomonas is a well-known bacterium that oxidizes ammonia (NH₃) into nitrites (NO₂⁻). This process is a crucial part of the nitrogen cycle.
- **Conclusion:** This match is correct.

### Final Assessment:
- From the analysis, we find that:
- (i) Clostridium - Food poisoning botulinum: **Correct**
- (ii) Xanthomonas esculenti - Bacterial blight of rice: **Incorrect**
- (iii) Nitrosomonas - Oxidizes ammonia to nitrites: **Correct**

Thus, the correct options are (i) and (iii).