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


- APons Varolii
- ✓Cerebellum
- CMedulla oblongata
- DMidbrain

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| Column $I$ | Column $II$ |
| ($a$) Smooth endoplasmic reticulum | ($i$) Protein synthesis |
| ($b$) Rough endoplasmic reticulum | ($ii$) Lipid synthesis |
| ($c$) Golgi complex | ($iii$) Glycosylation |
| ($d$) Centriole | ($iv$) Spindle formation |