Growth of facial hair and deepening of voice are symptoms of puberty in boys. Which harmone is responsible for it ?

Explanation

**Step-by-Step Solution:**

1. **Identify the Symptoms**: The question mentions two specific symptoms of puberty in boys: growth of facial hair and deepening of voice.

2. **Understand Puberty**: Puberty is a developmental stage that typically begins around the age of 10 and continues until about 16-17 years of age in boys. It is characterized by various physical and hormonal changes.

3. **Hormonal Changes During Puberty**: During puberty, the body undergoes significant hormonal changes. One of the key hormones that increases during this time is testosterone.

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