JEE Advanced 2016 Paper 2

While conducting the Young's double slit experiment, a student replaced the two slits with a large opaque plate in the x-y plane containing two small holes that act as two coherent point sources S1,S2 emitting light of wavelength 600 nm. The student mistakenly placed the screen parallel to the x-z plane (for z>0) at a distance D=3m from the mid- point of S1,S2 as shown schematically in the figure.The distance between the sources d=0.6003.The origin O is at the intersection of the screen and the line joining S1,S2 Which of the following is (are) true of the intensity pattern