Good Impact: The truth that you've got taken Maths helps make a good impression on interview board users (it occurred in my scenario !). They're more than happy to see that you've opted for just a tough optional. Have self belief and do not Look at with anyone else. This https://upsc-mathematics-optional68641.fliplife-wiki.com/3385474/a_simple_key_for_is_upsc_maths_optional_tough_unveiled