"They (RJD) must come out with a rebuttal as part of the coalition 'dharma' so that the 'Mahagatbandhan's' (Grand Alliance) image in terms of public probity is not damaged," he told PTI here.
This must be done in the interest of maintaining probity and integrity of the coalition in the public eye, Varma said.
"We have made our position clear. The RJD leaders against whom allegations have been made must give a public rejoinder which is substantive and factual," he said.
The JD (U) leader was in the city to attend the Indian Chamber of Commerce's 89th Annual General Meeting .
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On the CBI probe, Varma said, "An FIR has been registered. If Tejaswi Yadav or other members of Lalu Prasad's family, who believe they have been targeted as these charges are false or politically motivated, then they need to place in the public realm a factual and point-by-point rebuttal."
The JD(U) had, yesterday, asked the RJD to come clean on the allegations against Tejashwi, the son of its supremo Lalu Prasad, with facts and not "display arrogance" of having 80 MLAs.
He cited the Lalit Modi case in Rajasthan, the PDS scam in Chhattisgarh, the investigations into the Vyapam scam in Madhya Pradesh and the land scam in Gujarat in this regard.
The JD(U) has always fought against corruption and this fight should not be "selective", Varma said.