[A] : Thiamine deficiency results in beriberi causing paralysis.
[R]: People eating raw fish may also suffer from paralysis due to the deficiency of vitamin B1. Cooked fish has no such effect.
a) If both A and R are true and R is the correct explanation of A
b) If both A and R are true but R is not the correct explanation of A
c) If A is true and R is false
d) If both A and R are false

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To solve the question regarding the assertion and reason provided, we will analyze both statements step by step.

### Step-by-Step Solution:

1. **Understanding Assertion (A)**:
- The assertion states that "Thiamine deficiency results in beriberi causing paralysis."
- Thiamine, also known as vitamin B1, is essential for nerve function and energy metabolism. Its deficiency leads to beriberi, which can manifest as paralysis, especially in the nervous system (dry beriberi).

2. **Understanding Reason (R)**:
- The reason states that "People eating raw fish may also suffer from paralysis due to the deficiency of vitamin B1. Cooked fish has no such effect."
- This is true because some raw fish contain an enzyme called thiaminase, which breaks down thiamine. Therefore, consuming raw fish can lead to a deficiency of vitamin B1, resulting in paralysis.

3. **Evaluating the Relationship**:
- Both the assertion and the reason are true statements.
- The reason explains how eating raw fish can lead to thiamine deficiency, which in turn can cause paralysis (beriberi). Thus, the reason provides a direct explanation for the assertion.

4. **Choosing the Correct Option**:
- Since both statements are true and the reason correctly explains the assertion, the correct answer is:
- **a) If both A and R are true and R is the correct explanation of A.**

### Summary of the Solution:
- **Assertion (A)** is true: Thiamine deficiency causes beriberi and paralysis.
- **Reason (R)** is true: Raw fish can lead to thiamine deficiency due to thiaminase, while cooked fish does not have this effect.
- The correct answer is **a)**.