Option 1 -> The passage shows he already liked classical music; he wasn't intimidated into learning it.
Option 2 -> He correctly identified Beethoven's Emperor Concerto and all but one of the other pieces played, which led to the senior befriending him and inviting him for tea.
Option 3 -> This contradicts the passage - he correctly identified all except one piece.
Option 4 -> It wasn't a punishment; the senior was testing his knowledge and the interaction ended positively with a tea invitation.
Hence, Option 2 -> Amitav Ghosh accurately identified most of the classical music pieces (including Beethoven's Emperor Concerto), impressing Rukun Advani enough that he extended his hand in friendship and invited him for tea at Maurice Nagar, transforming a feared ragging experience into a positive connection -> correct