The cause(s) of indigestion is/are -

Options

A. Inadequate enzymes secretion
B. Anxiety
C. 'Food poisoning, over eating and spicy food
D. All

Answer

### Step-by-Step Solution:

1. **Understanding Indigestion**: Indigestion, also known as dyspepsia, refers to discomfort or pain in the upper abdomen. It can be caused by various factors, including dietary habits and psychological conditions.

2. **Identifying Causes**: The causes of indigestion can be categorized into several groups:
- **Dietary Factors**: Overeating, consuming spicy or fatty foods, and eating poor-quality food can lead to indigestion. Large quantities of food can overwhelm the digestive system.
- **Enzyme Secretion**: Inadequate secretion of digestive enzymes can hinder proper digestion, leading to symptoms of indigestion.
- **Food Poisoning**: Consuming contaminated food can cause gastrointestinal distress, resulting in indigestion.
- **Psychological Factors**: Anxiety and stress can affect digestion and may lead to symptoms of indigestion.

3. **Summarizing the Causes**: The main causes of indigestion include:
- Overeating
- Spicy or fatty foods
- Poor-quality food
- Inadequate enzyme secretion
- Food poisoning
- Anxiety and stress

### Final Answer:
The causes of indigestion include overeating, consumption of spicy or fatty foods, poor-quality food, inadequate enzyme secretion, food poisoning, and psychological factors such as anxiety.

---