A) bigemina
B) arenacea
C) allata
D) quadrigemina
Correct Answer: D
Solution :
The midbrain or mesencephalon consists of optic lobes and crura cerebri. In frog, there are two optic lobes (corpora bigemina) which are hollow but in man, there are four solid optic lobes lying behind the diencephalon. They collectively constitute the corpora quadrigemina.
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