###Rationale: Some epithelia derived from ectoderm- the epithelium of the skin , hair follicles, sweat glands, sebaceous glands, and mammary glands - the epithelium over cornea and conjunctiva, external acoustic meatus and the outer surface of the tympanic membrane- the epithelium of some pa of the mouth, the lower pa of the anal canal, terminal pa of the male urethra, pas of the female external genitaliaRef: Human Embryology; Inderbir Singh; Tenth Edition; Page No: 95

###Answer: OPTION A IS CORRECT.
###Question: Which of the following is derived from ectoderm?
###Options:
A. Epithelium of iris
B. Ciliary muscles
C. Vascular endothelium
D. Sclera
