Civil Servants. Union Public Service Commission(UPSC) conducts Civil Services Examination(CSE) in two stages.
Every year Union Public Service Commission conducts Civil Services Exams across India.
Most of the aspirants think that Preliminary examination is a tough nut to crack and they feel that it is the traditional General Studies paper which makes their attempts miserable.
Yes, it's definitely a wise decision. The subject has a mixed syllabus. It contains Evolution, Biology part specifically Genetics(including few more topics) and little about human cell.