Graduate Pharmacy Aptitude Test (GPAT) 2012 Solved Paper

Progesterone Is obtained from diosgenin through the following sequence of chemical reactions:
[P] : Acetyation, CrO3 (oxidation), Acetolysis, H2∕Pd, Hydrolysis and Oppenauer oxidation
[Q] : Oppenauer oxidation, Acetylation, CrO3 (oxidation), Acetolysis, H2∕Pd and Hydrolysis
[R] : CrO3 (oxidation), Acetolysis, Acetytation, Oppenauer oxidation, Hydrolysis and H2∕Pd
[S] : Acetylation, H2∕Pd, Hydrolysis, CrO3 (oxidation), Oppenauer oxidation and Acetolysis
Choose the correct sequence of reactions.