MCQ
Universal donors and universal receipients are
- A$A, B$ and $O$ blood groups, respectively
- ✓$0$ and $AB$ blood groups, respectively
- C$0$ and $A$ blood groups, respectively
- D$AB$ and $O$ blood groups, respectively
Universal receipient $= AB$ blood group
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$I.$ It does not help in water conduction.
$II.$ It is also called alburnum.
$III.$ It is dark in colour but very soft.
$IV.$ It has tracheary elements, which are filled with tannin, resin, etc.
$R$ : Epithelial cells are not secretory in nature.