For the third resonance, which option shows correct mode shaoe for displacement variation and pressure variation.

Options

A.
B.
C.
D.

Explanation

To solve the question regarding the correct mode shape for displacement variation and pressure variation for the third resonance, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Resonance in Open and Closed Ends:**
- In a tube that is open at one end and closed at the other, the open end will have a displacement antinode (maximum displacement) and a pressure node (minimum pressure).
- Conversely, at the closed end, there will be a displacement node (minimum displacement) and a pressure antinode (maximum pressure).

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