MCQ
In the given diagram, what does '$A$' represents?


- APons Varolii
- ✓Cerebellum
- CMedulla oblongata
- DMidbrain

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$A$. Presence of a mid-dorsal, solid and double nerve cord.
$B$. Presence of closed circulatory system.
$C$. Presence of paired pharyngeal gill slits.
$D$. Presence of dorsal heart
$E$. Triploblastic pseudocoelomate animals.
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