Internal fertilisation occurs:

Options

A. in female body
B. outside female body
C. in male body
D. outside male body.

Explanation

**Step-by-Step Solution:**

1. **Understanding Fertilization**: Fertilization is the process where male and female gametes (sperm and egg) fuse to form a zygote. This can occur in two ways: internal fertilization and external fertilization.

2. **Defining Internal Fertilization**: Internal fertilization is a type of fertilization that occurs inside the female body. This means that the sperm fertilizes the egg within the reproductive tract of the female.

3. **Identifying the Correct Option**: Given the options:
- A) Inside the female body
- B) Outside the female body
- C) In the male body
- D) Outside the male body

The correct answer is option A, as internal fertilization specifically refers to fertilization occurring within the female body.

4. **Examples of Internal Fertilization**: Common examples of animals that undergo internal fertilization include humans (Homo sapiens), cows, and many other mammals.

5. **Conclusion**: Therefore, the answer to the question "Internal fertilization occurs:" is option A, which states that it occurs inside the female body.