Assertion: Mendel successfully formulated the laws of heredity.
Reason: Mendel did not carry out the study of one character at a time. a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. c) If Assertion is true but the Reason is false. d) If both Assertion and Reason are false.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and 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 "Mendel successfully formulated the laws of heredity."
- This is true. Gregor Mendel is known as the father of genetics and he formulated the foundational laws of heredity, including the Law of Dominance, the Law of Segregation, and the Law of Independent Assortment.

2. **Understanding the Reason**:
- The reason states that "Mendel did not carry out the study of one character at a time."
- This statement is false. In his experiments, Mendel primarily focused on one trait at a time. For example, he studied the inheritance of flower color, seed shape, and pod color separately before considering multiple traits together.

3. **Evaluating the Relationship**:
- Since the assertion is true and the reason is false, we need to determine the correct option based on this evaluation.

4. **Choosing the Correct Option**:
- The options provided are:
a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
c) If Assertion is true but the Reason is false.
d) If both Assertion and Reason are false.
- Since the assertion is true and the reason is false, the correct answer is option **c)**: If Assertion is true but Reason is false.

### Final Answer:
The correct option is **c)**: If Assertion is true but Reason is false.