A) vasopressin and relaxin
B) heparin and histamine
C) heparin and calcitonin
D) serotonin and melanin
Correct Answer: B
Solution :
[b] Mast cells are granulated wandering leucocyte cells. Their granules contain histamine which is vasodilator and heparin (anticoagulant). These take part in body defence and allergic reaction.
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