Mark the hormone given in column I and the endocrine cells given in column II.

	Column-I		Column-II
(a)	$\mathrm{\alpha }$-cell	(i)	Inhibin
(b)	$\mathrm{\beta }$-cell	(ii)	Glucagon
(c)	Leydig cell	(iii)	Insulin
(d)	Sertoli cells	(iv)	Testosterone

	A	B	C	D
1.	i	iii	iv	ii
2.	iii	ii	iv	i
3.	i	iii	ii	iv
4.	ii	iii	iv	i

Glucagon is secreted from the alpha cells of pancreas when the blood sugar level is low. 

It stimulates glycogen breakdown and glucose synthesis in the liver by increasing blood glucose concentration. 

Whereas rising level of blood glucose stimulates insulin secretion from the beta cells of pancreas. 

Leydig cells secretes testosterone hormone and Sertoli cells secretes inhibin.