On inserting a first order red interference filter in SE-NW direction, the interference figure of quartz shows

Q. On inserting a first order red interference filter in SE-NW direction, the interference figure of quartz shows

(A) blue in NE, SW quadrants and yellow in NW, SE quadrants.

(B) yellow in NE, SW quadrants and blue in NW, SE quadrants.

(C) blue in NE, NW quadrants and yellow in SW, SE quadrants.

(D) yellow in NE, NW quadrants and blue in SW, SE quadrants.

Ans:

(A or B)

blue in NE, SW quadrants and yellow in NW, SE quadrants.
OR yellow in NE, SW quadrants and blue in NW, SE quadrants.