The total path difference between two waves meeting at points P₁ and P₂ or the screen are (3λ/2) and 2λ respectively. Then :
a. bright ringes are formed at both points.
b. dark fringes are formed at both points.
c. a brightfringe is formed at P₁ and a dark fringe is formed at P₂
d. a bright fringe is formed at P₂ and a dark fringe is formed at P₁.