Refer to the given figure in which A refers to pulmonary artery pressure and B refers to right ventricular pressure. Identify P,Q,R and S in the figure and match with the list (i-iv) given below
(i) Isovolumetric ventricular contraction
(ii) Ventricular ejection
(iii) Isovolumetric ventricular relaxation
(iv) Ventricular filling
A. P-(iv),Q-(iii),R-(ii),S-(i)
B. P-(ii),Q-(iii),R-(i),S-(iv)
C. P-(iv),Q-(i),R-(ii),S-(iii)
D. P-(i),Q-(ii),R-(iii),S-(iv)