Match the items in column I with those in column II and choose the correct option.

	Column-I		Column-II
(a)	P wave	(i)	Ventricular depolarisation
(b)	QRS complex	(ii)	Ventricular repolarisation
(c)	T wave	(iii)	Isoelectric period
(d)	S-T segment	(iv)	Atrial depolarisation

	(a)	(b)	(c)	(d)
1.	iii	iv	i	ii
2.	iv	ii	i	iii
3.	iv	i	ii	iii
4.	iv	iii	i	ii

• A

  1

• B

  2

• C

  3

• D

  4