Gonadotropic hormones are:

Options

A. Estrogen and progesterone
B. Luteinizing hormone and follicle stimulating hormone
C. Testosterone and androsterone
D. Prolactin and Luteotropin

Answer

**Step-by-Step Solution:**

1. **Understanding Gonadotropic Hormones**: Gonadotropic hormones are hormones that stimulate the activity of the gonads (the reproductive organs). They play a crucial role in regulating reproductive processes.

2. **Identifying the Source**: These hormones are released from the pituitary gland, which is located at the base of the brain. The pituitary gland is often referred to as the "master gland" because it regulates many bodily functions.

3. **Key Gonadotropic Hormones**: The primary gonadotropic hormones are:
- **Luteinizing Hormone (LH)**: This hormone stimulates the secretion of androgens in males and triggers ovulation in females.
- **Follicle Stimulating Hormone (FSH)**: This hormone is responsible for the growth of ovarian follicles in females and stimulates spermatogenesis in males.

4. **Eliminating Incorrect Options**:
- **Estrogen and Progesterone**: These are sex hormones produced by the gonads (ovaries and testes) and are not classified as gonadotropic hormones since they do not originate from the pituitary gland.
- **Testosterone and Aldosterone**: Testosterone is a male sex hormone produced by the testes, while aldosterone is involved in sodium absorption and is not a gonadotropic hormone.
- **Prolactin and Luteotropin**: Prolactin is involved in milk production, and luteotropin (also known as LH) is already mentioned as a gonadotropic hormone, but prolactin itself is not.

5. **Conclusion**: The correct answer to the question "Gonadotropic hormones are:" is **Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH)**.

---