Consider the following statements: The state of stress in a fluid consists of normal pressure only if the fluid
1. Is at rest
2. Is in uniform motion
3. Has – non – uniform velocity profile
4. Has zero viscosity
Which of the statements given above are correct?
(a) 1, 2 and 3 (b) 1, 2 and 4 (c) 1, 3 and 4 (d) 2, 3 and 4