Consider the following statements:
1. Boundary – layer thickness in laminar flow is greater than that of turbulent flow.
2. Boundary – layer thickness of turbulent flow is greater than that of laminar flow.
3. Velocity distributes uniformly in a turbulent boundary layer.
4. Velocity has a gradual variation in a laminar boundary – layer.
Which of the statements given above are correct?
(a) 1, 3 and 4 only (b) 1, 2, 3 and 4
(c) 1 and 2 only (d) 2, 3 and 4 only