The Prime Minister, who is on his way to Delhi from Iran, has said there is no question of resigning over the alleged "coal-gate" affair. "I have to maintain the dignity of the office of the Prime Minister," he said, when asked about his response to the BJP's unrelenting demand for him to quit. "If I were resigning, I would not be here," he said on his plane, referring to his trip to Iran for a conference of the Non-Aligned Movement (NAM).