I feel the BJP has already scored a self-goal. If NDA constituents abstain or even worse vote for the UPA, it weakens the NDA.
Akalis are most likely to abstain or vote the UPA. Trinamool Congress will cross over to the UPA. MDMK a potential post-poll ally of NDA has split vertically. Both National Conference and PDP supporting the UPA rules out an ally for the NDA in J&K.
The JMM and Ajit Singh maybe playing hard to get. But in Jharkhand, the JMM faces of the BJP and has no option to support the UPA. As for Ajit Singh, in UP the two major alliances is one led by BSP and the other SP-Congress. Both of equal strengths. So there is a question mark
Then they are minor parties like those of the NE states. They are mostly likely throw their weight behind the UPA