MCQ
Identify $X$ from figure :


- ACavity of uterus
- ✓Placental villi
- CYolk sac
- DUmbillical cord with its vessels

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$(a)$ $C-$peptide is not present in mature insulin.
$(b)$ The insulin produced by $rDNA$ technology has $C-$peptide.
$(c)$ The pro-insulin has $C-$peptide.
$(d)$ $A-$peptide and $B-$peptide of insulin are interconnected by disulphide bridges.
Choose the correct answer from the options given below.
$T$-cells are lymphocytes which produce the cellular immunity. These are developed from