NEW DELHI - Is the Rajya Sabha a backdoor entry into parliament as opposed to the Lok Sabha? It’s not just the Bharatiya Janata Party that has used such a taunt against Prime Minister Manmohan Singh, who represents Assam in the upper house.

M.K. Stalin, Tamil Nadu’s minister for rural development and local administration and the son of chief minister M. Karunanidhi, is the latest to hurl this jibe at his archrival, PMK leader Anbumani Ramadoss.

But Ramadoss is not taking it lying down. Those who live inside glass houses shouldn’t throw stones at others, he told a journalist in Chennai when asked about Stalin’s charge that he entered parliament through the backdoor.

‘He (Stalin) should first ask his sister Kanimozhi that question. Then he can ask Indian prime minister Dr. Manmohan Singh. Even Murasoli Maran (Stalin’s uncle) was a Rajya Sabha member.’

‘By terming the Rajya Sabha the backdoor for parliament, Stalin is demeaning the institution. We will raise this issue in parliament after elections,’ Ramadoss said.