Graduate Pharmacy Aptitude Test (GPAT) 2011 Solved Paper

In an optically active organic compound a chiral carbon has the following attached groups: using Sequence Rules choose the correct order of priority of the groups.
[P] −

O

|| C

−CH3
[Q] −

O

|| C

−OH
[R] −CH=CH2
[S] −C≡CH
Using 'Sequence Rules' choose the correct order of priority of the groups