Dramatic changes of body features associated with puberty are mainly because of secretion of

Options

A. oestrogen from testes and testosterone from ovary
B. estrogen from adrenal gland and testosterone from pituitary gland
C. testosterone from testes and estrogen from ovary
D. testosterone from thyroid gland and estrogen from pituitary gland

Explanation

**Step-by-Step Solution:**

1. **Understanding Puberty**: Puberty is a developmental stage where significant physical changes occur in the body, leading to sexual maturity. These changes are primarily driven by hormones.

2. **Identifying Key Hormones**: The main hormones involved in puberty are estrogen and testosterone. Estrogen is primarily responsible for the development of female secondary sexual characteristics, while testosterone is responsible for male secondary sexual characteristics.

3. **Source of Hormones**:
- In females, estrogen is secreted by the ovaries.
- In males, testosterone is secreted by the testes.

4. **Analyzing Options**:
- **Option 1**: "Estrogen from testes" - Incorrect, as estrogen is not produced in the testes.
- **Option 2**: "Estrogen from the adrenal gland and testosterone from the pituitary" - Incorrect, as estrogen is produced in the ovaries, and testosterone is produced in the testes.
- **Option 3**: "Testosterone from the testes and estrogen from the ovaries" - Correct, as this accurately describes the source of both hormones.
- **Option 4**: "Testosterone from the thyroid gland and estrogen from the pituitary" - Incorrect, as testosterone is not produced in the thyroid gland and estrogen is not produced in the pituitary.

5. **Conclusion**: The correct answer is **Option 3**: Testosterone from the testes and estrogen from the ovaries, as these hormones are responsible for the dramatic changes in body features during puberty.

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