Sir J.C Bose was supporter of ____ theory of ascent of sap.

Options

A. Root pressure theory
B. Physical force theory
C. Vital force theory
D. None of these

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question:**
The question asks which theory Sir J.C. Bose supported regarding the ascent of sap in plants.

2. **Identifying the Theories:**
The options provided are:
- A) Root Pressure Theory
- B) Physical Force Theory
- C) Vital Force Theory
- D) None of these

3. **Reviewing Each Theory:**
- **Root Pressure Theory:** Proposed by Priestley, this theory states that water absorbed by root hairs creates pressure that pushes water up through the xylem.
- **Physical Force Theory:** Proposed by Godly Whiskey, this theory explains that changes in water potential in living cells help in the vertical movement of water against gravity.
- **Vital Force Theory:** Proposed by Brazilius, this theory suggests that organic components are synthesized only within living organisms.

4. **Identifying Sir J.C. Bose's Contribution:**
Sir J.C. Bose was known for his work on the "Pulvinus Theory," which is not listed among the options provided. Therefore, he does not support any of the theories mentioned in the options.

5. **Conclusion:**
Since Sir J.C. Bose's theory is not represented in the options given, the correct answer is **D) None of these**.

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