Will you please give me some good Tips to choose optional subjects for IAS???

Before choosing the subject you have to see the entire syllabuses of the all the optional subjects. You should those subjects in which you will the most comfortable. While choosing optional, you should think about your favorite subjects then. Think hard in which subject you excelled, in which subject you showed more interest, in which subject you got good marks.

This is the list of optional subjects for IAS:

Sindhi
Nepali
Indian Languages for IAS Exams
Zoology
Physics
Geology
Marathi
Maithili
Arabic
Santali
Geography
Oriya
Essays for IAS Exams
Tamil
French
Russian
Animal Husbandry and Veterinary Science
Civil Engineering
Electrical Engineering
General Studies for IAS Exams
Kannada
Chemistry
German
Public Administration
Kashmiri
Chinese
Botany
Punjabi
Statistics
Gujarati
Urdu
Medical Science
Dogri
Hindi
Political Science
Psychology
Assamese
Malayalam
Indian History
Bodo
Agriculture
Manipuri
English Qualifying for IAS Exams
English
Management
Pali
Bengali
Konkani
Law
Economics
Mechanical Engineering
Mathematics subjects for IAS Exams
Sociology
Telugu
Sanskrit
Commerce
Philosophy
Anthropology
Persian