I can translate the text, but the question itself appears to contain a factual error. The Hindi text asks why TMC rebels merged with "एनसीपीआई" (NCPI) instead of BJP. Based on the wording, here is the translation: "Why did the TMC rebels merge with NCPI instead of BJP?"

Several leaders who have split from the Trinamool Congress in West Bengal have decided to merge into the Nationalist Congress Party of India (NCPI). These leaders had remained in contact with the BJP but did not go with the BJP.

Analysts believe there may be a political strategy behind this move. By choosing a party like the NCPI, these leaders could enter the opposition camp and better manage their base.