Match the items given in Column I with those in Column II and select the correct option given below: 

	Column I		Column II
a.	P wave	i.	Heart rate
b.	QRS complex	ii.	Atrial depolarisation
c.	T wave	iii.	Ventricular depolarisation
d.	Number of QRS complexes	iv.	Ventricular repolarisation

• A

  a(iii), b(ii), c(iv), d(i)

• B

  a(ii), b(i), c(iv), d(iii)

• C

  a(ii), b(iii), c(i), d(iv)

• D

  a(ii), b(iii), c(iv), d(i)