Topper. “A student who gets the highest results in the class,” in the definition of the Oxford Learner’s Dictionary, which marks the word as Indian English.
IITian. A graduate of one of the Indian Institutes of Technology. Wiktionary marks the word as Indian usage.
AIR. All India Rank. When the civil services results came out in 2024, Careers360 reported that “Aditya Srivastava secures AIR 1.”