Assertion (A): Lactation happens at the adolescent stage of a female.
Reason (R): The secretion of diiferent hormones during the later stage of pregnancy helps in milk production.

Options

A. Both A and R are true and R is the correct explanation for A.
B. Both A and Rare true, but R is not the correct explanation for A.
C. A is true and R is false.
D. A is false and R is true.

Explanation

### Step-by-Step Solution

1. **Understanding the Assertion (A)**: The assertion states that "Lactation happens at the adolescent stage of a female."
- **Analysis**: Lactation is the process of producing milk in mammals, which occurs in females after childbirth, not during adolescence. Therefore, this statement is **false**.

2. **Understanding the Reason (R)**: The reason states that "The secretion of different hormones during the later stage of pregnancy helps in milk production."
- **Analysis**: This statement is true. During pregnancy, particularly after 12 to 18 weeks, hormones such as prolactin and oxytocin are secreted, which play a crucial role in milk production.

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