What is the configuration of the two chiral centers in the following molecule?

Question

Quizplus · Accepted Answer

The molecule has two chiral centers, one at carbon 3 and another at carbon 5. The priority of the substituents on carbon 3 are chlorine, methyl, ethyl and H, while on carbon 5 the priority order is methyl, ethyl, H and OH. By applying the R/S nomenclature rules, we find that carbon 3 has an S configuration and carbon 5 has an R configuration. Therefore, the correct configuration of the two chiral centers is 3S, 5R, which matches with option C.

What Is the Configuration of the Two Chiral Centers in the Following