Sir — West Bengal Chief Minister Mamata Banerjee’s statement is condemnable since it can provoke violence. The National Register of Citizens (NRC) exercise is not arbitrary; it is being monitored by the Supreme Court. The Finance Minister tweeted that Banerjee had raised the issue of “infiltration” in her State in 2005 in the lok Sabha. Today, she seems to have taken a U-turn. The TMC chief must explain the change in her stance.