Section: Fluid Mechanics | Marks: 1
The figure shows the developing zone and the fully developed region in a pipe flow where the steady flow takes place from left to right. The wall shear stress in the sections A, B, C, and D are given by 𝜏, 𝜏, 𝜏, and 𝜏, respectively. Select the correct statement.

- A. 𝜏 𝜏
- B. 𝜏 𝜏
- C. 𝜏 𝜏
- D. 𝜏 𝜏
Answer: A. 𝜏 𝜏