New Delhi: The RJD on Monday extended support to the Congress in the Rajya Sabha polls in Jharkhand on May 3, giving a shot in the arm to the party which is hoping to retain a seat from the state.

"We will support Congress candidate Pradip Balmuchu for Rajya Sabha election in Jharkhand," RJD chief Lalu Prasad told here.

Congress has 13 MLAs while its alliance partner Babulal Marandi's JVM (P) has 11 MLAs and Lalu Prasad's RJD has five members in the 80-member House.

With candidates from three parties BJP, JMM and Congress in the fray, a candidate requires the support of 27 members to win a Rajya Sabha seat from the state.

If JVM (P) sticks with its decision to abstain, the total numbers of votes to be polled in the RS election will be 69 and hence a candidate with 24 votes can emerge victorious.

Marandi's party has so far remained firm on abstaining from voting in the elections.

Congress candidate Balmuchu is Jharkhand PCC chief. A senior party leader speaking on condition of anonymity said that last minute efforts are on to get the support of JVM (P) and hoped the alliance partner would not be taking a course that ends up benefiting the Opposition BJP-JMM.

JVM (P) is unhappy with the Congress for not supporting its candidate Pravin Singh this time on the pretext that it had supported Congress candidate in 2008.

"We are confident of winning the seat. We will win," said a senior Congress leader from the state Rajendra Prasad Singh.

Both BJP and JMM have 18 members each in the Assembly with their alliance partners AJSU and JD-U having five and two members respectively.

JMM has also fielded a candidate Sanjiv Kumar even as senior BJP leader S S Ahluwalia is contesting the seat.

The term of office of two members of the Council of States elected from Jharkhand -- Ahluwalia from BJP and and Mabel Rebello from Congress expired on April 2, 2012.