Horizontal Line Test for verifying Injectivity (one-to-one mapping) — IITM BS previous year questions

Horizontal Line Test for verifying Injectivity (one-to-one mapping) is part of Fundamental Property Tests, Week 5 in Mathematics 1. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.