Assertion :- High dosage of progesterone is present in i-pill which is used as emergency contraceptive pill.
Reason :- Progesterone cause cervical mucous thickning and stops entry of sperms in uterine cavity.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "High dosage of progesterone is present in i-pill which is used as an emergency contraceptive pill."
- This is true. The i-pill contains a high dose of levonorgestrel, a synthetic form of progesterone, which is used for emergency contraception.

2. **Understanding the Reason**:
- The reason states that "Progesterone causes cervical mucus thickening and stops entry of sperms in the uterine cavity."
- This statement is also true. Progesterone does thicken the cervical mucus, making it more difficult for sperm to enter the uterus.

3. **Evaluating the Relationship**:
- While both the assertion and reason are true, we need to determine if the reason correctly explains the assertion.
- The assertion focuses on the use of high doses of progesterone in emergency contraception, while the reason discusses one of the mechanisms by which progesterone works (thickening of cervical mucus).

4. **Conclusion**:
- Since both statements are true, but the reason does not directly explain why high doses of progesterone are used in the i-pill, we conclude that:
- The correct answer is: "Both A and R are true, but R is not the correct explanation of A."

### Final Answer:
- Both A and R are true, but R is not the correct explanation of A.