Which of the following statement is correct?

• A

  Diffraction is because of interference of light from same source where as interference is due to light from two individual sources.

• B

  Diffraction pattern is due to interference of light from secondary waves of the same wave front where as interference is due to superposition of two waves derived from the same source

• C

  Diffraction is due to interference of light waves derived from the same source where as interference is bending of light at the edges of obstacle.

• D

  all the above.