India, March 10 -- It must've started with one curious student scanning the QR code on the CBSE Class 12 mathematics question paper, wondering what it's there for. Soon, social media was filled with videos of students landing on a YouTube video that had nothing to do with the paper or even math at all - it had someone dancing and singing, "Never gonna give you up."

Meme culture has a name for it: "Rickroll". We'll come to that.

First, to be sure, the Central Board of Secondary Education has clarified the QR code is meant to be security feature "to verify the genuineness of the question paper in case of suspected security breach"; and that it was not meant to lead to the song video. The board has confirmed that "the question papers are g...