During heavy exercise, we get cramps in the legs due to the accumulation of

Options

A. carbon dioxide
B. lactic acid
C. alcohol
D. water

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: During heavy exercise, our body undergoes various physiological changes. One of the common issues faced during intense physical activity is muscle cramps.

2. **Identifying the Cause of Cramps**: Muscle cramps during exercise are often linked to the way our muscles generate energy. When we exercise heavily, our muscles require more energy, which is typically produced through a process called respiration.

3. **Types of Respiration**: There are two types of respiration:
- **Aerobic Respiration**: This occurs when there is enough oxygen available, allowing glucose to be fully broken down into carbon dioxide and water, releasing energy.
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