"He (Mulayam Singh Yadav) is taking care of it," Lalu told PTI at a feast hosted by him for the second day today.
He tried to allay apprehension that the merger efforts have hit a roadblock as claimed by BJP and said, "The merger process is going on."
"BJP is spreading rumours about problems in merger. The process is on. We have authorised Mulayam Singh Yadav for it. He is not sitting idle. He is taking care of it," Lalu said.
With regard to further talks between representatives of six parties - JD (U), RJD, SP, Indian National Lok Dal (INLD), Janata Dal (Secular) and Samajwadi Janata Party (SJP) - Lalu said, "Yadav will tell when the meeting is scheduled and will also decide on a name of the new party."
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The RJD supremo also said he had no idea as to who started the talks about merger between JD(U) and RJD prior to the merger of all parties.
The absence of senior JD(U) leader and former Chief Minister Nitish Kumar reportedly due to fever had also fanned the speculation.
"All our (Janata Parivar) parties are discussing merger, but the BJP is trying to create rift among us and take advantage of the ensuing circumstances. This is what the BJP has done in all other states where elections have happened recently," Lalu said.