Without naming Rahul Gandhi, BJP's prime ministerial candidate Narendra Modi said here Monday the Congress vice president has lowered the dignity of the Prime Minister's Office.

"The prime minister says BJP leaders have taken politics to a new low. Who has taken the prime minister's post to a low," Modi asked at a rally here.

"No BJP person has lowered dignity of the PM's office. Those sitting close to you have lowered dignity of your office. Your party vice president (Rahul Gandhi) calls your decision nonsense in front of the full media," he said.

Prime Minister Manmohan Singh at a rally Sunday said "the BJP leader from Gujarat" is always talking about the Gujarat model of development but "several question marks were raised over the Gujarat model of development".

Without naming Modi, Manmohan Singh also said it has brought down the standard of political discourse and asked the people to "think seriously" what the party, which believes in "demeaning others", will do to the country.