UPSC Previous Year Questions: CSP 2021

@Arrokoth, did you delete your comment or something went wrong. I cannot see your comments!

Arrokothsaid

Oh, I deleted it. Thought better to solve it in my head, than to type it out. ?

Haha, How many things to solve in the head? Asking is always better. You get perspectives!

People try to give solution not just A,B,C will be more helpful.