New Delhi, Dec 03 (ANI): The Opposition parties have united in the Parliament demanding the resignation of BJP leader and Union Minister Sadhvi Niranjan Jyoti for her condemnable remarks during an election rally. TMC leader Derek O'Brien said that the opposition parties are unitedly demanding the resignation of the union minister as this is election time and she should have been careful about the words to be used. Meanwhile, Parliamentary Affairs Minister Venkaiah Naidu defended her saying that once the Minister has apologized for what she said the opposition should not use it as an issue to disrupt the parliamentary proceedings.