Help me chose my optional

I am post graduated in maths in 2024. But my 2 years of bachelor went to Covid and post graduation syllabus has nothing to with the syllabus. I will turn 23 this year , unemployed. Eager to write UPSC. Can anyone tell me should I go ahead with maths optional or any other subject ? I am fine but not over the bar in maths . I struggle but I get it in the end. Pls suggest me a different gs option