5 best optional subject for UPSC mains exam for engineers

1. Geography-it is also one of the best optional subjects, easy to learn and understand, it is a scoring subject, coaching material is easily available and also useful in GS paper 1

2. Political Science and international relations-it is also good subject and easily understood by aspirants, popular and books are easy available and also useful in GS paper 2

3. Public administration-it is also good optional subject which has high success rate, books are easily available, also scoring subject and useful in GS paper 2

4. Math-it is also a good optional subject which has less competition and scoring subjects for engineers and it is best for engineers as they have learnt the subject in their under grad.

5. History-it is one of the best optional subjects because apart from the optional paper, it is also useful in GS paper 1, easily understandable, scoring subject, coaching material is also available easily.