Which of the following is primary sex organ?

Options

A. Scrotum
B. Penis
C. Testes
D. Prostate

Answer

To determine which of the following is a primary sex organ, we need to analyze the options provided:

1. **Scrotum**: This is the pouch of skin that contains the testis. It does not produce gametes or hormones; rather, it serves to protect and regulate the temperature of the testis.

2. **Panacea**: This term seems to be a typographical error or confusion with "penis." The penis is an external organ that is involved in the delivery of sperm during ejaculation and the excretion of urine, but it is not a primary sex organ in terms of gamete production.

3. **Testis**: The testis is the primary male sex organ responsible for the production of sperm and male hormones (like testosterone). It plays a crucial role in the male reproductive system.

4. **Prostate**: The prostate is a gland that produces fluid that nourishes and transports sperm. It is not a primary sex organ but rather an accessory gland.

Based on this analysis, the primary sex organ among the options is:

**Answer: Testis (Option C)**

### Step-by-step Solution:
1. **Identify the options**: Scrotum, Panacea, Testis, Prostate.
2. **Define primary sex organs**: These are organs that produce gametes (sperm in males) and hormones.
3. **Analyze each option**:
- Scrotum: Protective pouch, not a primary organ.
- Panacea: Likely a confusion; not a primary organ.
- Testis: Produces sperm and hormones; primary sex organ.
- Prostate: Accessory gland, not a primary organ.
4. **Conclude**: The testis is the primary sex organ in the male reproductive system.