Congress senior leader AK Antony's son Anil K Antony has quit the party today.  Mr Anil quit the Congress a day after he criticized a controversial BBC documentary on Prime Minister Narendra Modi.<br />''<br />''Yesterday, he hit out at the BBC and called it a state sponsored channel with a long history of prejudices against India.<br />''His remarks come at a time when various units of Kerala unit of Congress have declared that the documentary will be screened in different parts of the state.<br />