I		II
(a)	Interferons	(i)	Fab
(b)	Paratop	(ii)	Inflammatory mediators
(c)	Interleukins	(iii)	Antiviral blood cell
(d)	Histamine	(iv)	Anticoagulant
		(v)	Antibiotic

Match and find correct option

The correct option is B $a-iii,b-i,c-iv,d-ii$

• Interferons are a group of signalling proteins made and released by host cells in response to the presence of several viruses. Generally, a virus-infected cell will release interferons causing nearby cells to make their anti-viral defences.
• A paratope also called an antigen-binding site or Fab. It is a part of an antibody which recognizes and binds to an antigen. It is a small region of the antibody containing the antibody's heavy and light chains.
• Interleukins (ILs) are a group of cytokines (secreted proteins and signal molecules) that were first seen to be expressed by white blood cells (leukocytes).
• Histamine is an organic nitrogenous compound involved in local immune responses, as well as regulating physiological function in the gut and acting as a neurotransmitter for the brain, spinal cord, and uterus. Histamine is involved in the inflammatory response and has a central role as a mediator of itching.
• So, the correct answer is 'a-iii,b-i,c-iv,d-ii'.