All 32 seats, which have sitting MLAs of Congress, will fight the poll except Debi Prasad Roy of Alipurduar who had earlier expressed his desire not to contest in case of a Congress-CPI(M) alliance.
Chowdhury told reporters that most of the differences over seat adjustment had been sorted out.
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"The role of the CPI(M) in forging the alliance is very positive, cordial and transparent. Both of us are very flexible on forming the alliance," he said.
He, however, pointed out that there might be four to five seats which would witness friendly fights.
"The CPI(M) is willing to make sacrifices, but they have alliance partners who also have their say," he said.