MCQ

In the above picture Q represents.
- AExitation of the atria.
- BDepolarisation of ventricles.
- CBegining of systole.
- DRepolarisation.

Explanation:

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Types of leucocytes Function
$A.$ Neutrophils $1.$ Heparin and histamine secretion
$B.$ Basophils $2.$ Antibodies formation
$C.$ Acidophils $3.$ Scavanger
$D.$ Monocytes $4.$ Phagocytes
$E.$ Lymphocytes $5.$ Antiallergic and healing of wounds
The correct pairing sequence is
Choose the correct combination of $A$ and $B$ with reference to above statement