A: Muscle tetanus is the phenomenon of sustained contraction of a muscle due to succession of nerve impulse/stimuli being received by it
R: Many of our daily activities are due to tetanic contraction of muscles like holding the book.

Options

A. IF both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark
B. If Both Assertion & Reason are true but the reason is not the correct exlanation of the assertion then mark
C. IF Assertion is true statement but Reason is false then mark
D. If both Assertion and Reason are false statements then joint

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that muscle tetanus is a phenomenon of sustained contraction of a muscle due to a succession of nerve impulses or stimuli being received by it.
- This means that when a muscle receives rapid and repeated signals from the nervous system, it can lead to a continuous contraction without relaxation, known as tetanus.

2. **Understanding the Reason:**
- The reason provided states that many of our daily activities, such as holding a book, are due to tetanic contraction of muscles.
- This implies that when we perform activities that require sustained muscle contraction, like holding a book, our muscles are in a state of tetanus.

3. **Evaluating the Relationship:**
- Both the assertion and the reason are correct statements about muscle function.
- However, the reason does not directly explain the assertion. The assertion describes the mechanism (sustained contraction due to nerve impulses), while the reason gives an example of an activity that involves tetanic contraction.

4. **Conclusion:**
- Since both statements are true but the reason does not adequately explain the assertion, the correct answer to the question is that both A and R are correct, but R is not the correct explanation of A. Therefore, the appropriate option is B.