Graduate Pharmacy Aptitude Test (GPAT) 2012 Solved Paper

Question : 74 of 148

Marks: +1, -0

One of the following ring systems can be used as the bioisosteric replacement for benzene ring in drug design:
[P]: Thiophene
[Q]: Cyclohexa-l,3-diene
[R] : Pyrrolidine
[S]: Imidazoline
Identify the correct answer. -