###Rationale: Ans. is 'a' i.e., Pterygium is line of iron deposition in the corneal epithelium seen adjacent to the head of the pterygium.

###Answer: OPTION A IS CORRECT.
###Question: Stocker's line is seen in?
###Options:
A. Pterygium
B. Glaucoma
C. Posterior scleritis
D. Diabetic retinopathy
