Nested lists - list of lists as a 2-D structure — IITM BS previous year questions

Nested lists - list of lists as a 2-D structure is part of Lists - Iteration and Processing, Week 5 in Computational Thinking. 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.