The BJP, which heads the coalition government in the state, would be the lone ally to vote for P A Sangma.
The lone MLA of the Marxist Coordination Committee, Arup Chatterjee said he would vote for Mukherjee, while the lone CPI (ML-Liberation) member Vinod Kumar Singh, said he would abstain.
"Polling arrangements are ready for 81 MLAs and one Congress MP, Pradeep Kumar Balmachu, who chose to vote here," Assembly Secretariat