Common enteritis infection in India occurs by

Options

A. Mosquito bite
B. Viruses
C. Ingesting cysts with food and drinks
D. Eating spice rich food.

Explanation

### Step-by-Step Solution:

1. **Understanding Enteritis**:
- Enteritis is the inflammation of the intestine, which can affect the digestive system. It is characterized by symptoms such as abdominal pain, cramping, diarrhea, dehydration, and fever.

2. **Identifying Causes of Enteritis**:
- The question asks about common causes of enteritis in India. We need to evaluate the options provided: mosquito bite, viruses, ingesting cysts with food and drinks, and eating spice-rich food.

3. **Analyzing Each Option**:
- **Mosquito Bite**: This option is incorrect. Mosquito bites are associated with diseases like malaria and dengue, not enteritis.
- **Viruses**: While some viral infections can cause gastrointestinal symptoms, they are not the primary cause of enteritis in this context.
- **Ingesting Cysts with Food and Drinks**: This option is correct. Enteritis is commonly caused by ingesting contaminated food and drinks that contain cysts of parasites. These cysts can remain dormant until they enter the body and cause disease.
- **Eating Spice-Rich Food**: This option is also incorrect. While spicy foods can lead to gastritis (inflammation of the stomach), they do not cause enteritis.

4. **Conclusion**:
- The most common cause of enteritis infection in India is the ingestion of cysts with contaminated food and drinks. Therefore, the correct answer is **ingesting cysts with food and drinks**.