Union Minister Shashi Tharoor today said Wharton India Economic Forum should not have cancelled the invitation to Gujarat Chief Minister Narendra Modi and instead students could have used the opportunity to "challenge" his decisions after hearing him out.

"I disagree profoundly with Mr Modi...Students should have gone through his various decisions and record. Once invited, they should have actually heard him out and they should have actually challenged (Modi's various decisions)," he told reporters outside Parliament House.

He said the "process" should have been to listen to him and then grill him on various issues. "University is a place where you can answer questions and ask questions...Once you invite somebody, then disinviting is unnecessary," he said.