NEW DELHI — The National Testing Agency (NTA) announced Tuesday that it has successfully refined a revenue model based entirely on its own inability to write a correct exam, inviting JEE Main candidates to pay Rs 200 per question to perform the agency's final proofreading.

The "challenge mechanism," which closes April 27, requires students to pay the government body a non-refundable processing fee for the privilege of highlighting basic errors in the provisional answer keys. A spokesperson for the agency praised the financial efficiency of the system, pointing to the exam's previous session in February where the NTA collected thousands of challenge fees before quietly dropping three erroneous questions from the final key without issuing a single refund.

"It is a cornerstone of our fair and transparent examination process that we get paid regardless of who is correct," said an official, noting that if just one percent of the million candidates spots a single mistake, the agency grosses Rs 20 lakh. "We are very optimistic about the number of errors our team has managed to include in this month's paper."