###Rationale: The outer epithelial layer formed by the ectoderm, inner mucosal layer by the endoderm and middle fibrous layer by the mesoderm. Ref: Dhingra 6th edition page no.12

###Answer: OPTION A IS CORRECT.
###Question: The following structure represents all the 3 components of the embryonic disc
###Options:
A. Tympanic membrane
B. Retina
C. Meninges
D. None of the above
