###Rationale: In complicated cataract 'polychromatic luster'ie., appearance of iridescent coloured paicles of reds, greens and blue is a very characteristic sign (Rainbow cataract). IMG REF

###Answer: OPTION A IS CORRECT.
###Question: Polychromatic lusture is seen in-
###Options:
A. Complicated cataract
B. Diabetes mellitus
C. Post radiation cataract
D. Congenital cataract
