Hi Bindu,

Greta to know that you are an Civil Service aspirant :) There are about 20+ subjects for UPSC examination like  Agriculture, Management, Animal Husbandry and Veterinary Science, Mathematics, Anthropology, Mechanical Engineering, Botany, Medical Science, Chemistry, Philosophy, Civil Engineering etc. So, in whatever specialization you have, you can apply to UPSC exams.

For more information visit, https://competition.careers360.com/articles/upsc-ias-syllabus

All the very best for your Future.