Consider the following statements in case of young's double slit experiment.
(1)A slit S is necessary if we use an ordinary extended source of light.
(2)A slit S is not needed if we use an ordinary but well collimated beam of light.
(3)A slit S is not needed if We use a spatially coherent source of light. Which of the above statements are correct?

Options

A. (1),(2) and (3)
B. (1) and (2)
C. (2) and (3)
D. (1) and (3)

Explanation

A