Kolkata: TMC on Saturday questioned whether Rajat Shubhra Banerjee was a British national and staying in Kolkata with an OCI card.This came on a day when Bengal BJP spokesperson Samik Bhattacharya said that "to the best of my knowledge, he (Banerjee) is not an Indian citizen and therefore the Bengal medical council cannot question him".TMC spokesperson Kunal Ghosh said: "If he is a British citizen and here on an OCI card, then why is he (Banerjee) making political statements? Isn't that ground enough to declare him a persona non grata and throw him out of Bengal? But we are a democracy, we will never ask for it."