Answer: (b)

Explanation:
Statement 1 is correct: Subhas Chandra Bose formed the Forward Bloc in 1939 after resigning from the presidency of the Indian National Congress due to serious ideological and political differences within the Congress. Bose had won the Tripuri session election against the candidate supported by Mahatma Gandhi, but he failed to gain Gandhi's confidence and support.

Statement 2 is correct: The Congress Left was divided and could not unite effectively behind Bose.

Statement 3 is incorrect: The Communist Party of India (CPI) actually broke ranks with other left factions and voted for Subhas Chandra Bose during his presidential re-election campaign against Pattabhi Sitaramayya. Furthermore, when Bose initially established the Forward Bloc to rally radical elements, the Communists actively co-operated with him by joining his short-lived Left Consolidation Committee (LCC) in June 1939.

Statement 4 is correct: other leftist groups-the Congress Socialist Party (CSP) led by Jayaprakash Narayan and the Radical Democratic elements following M.N. Roy-abstained from key voting divisions (such as the Pant Resolution), prioritizing the overarching unity of the Congress party over factional support for Bose's radical agenda. This fractionalization within his own ideological camp left Bose isolated, prompting him to resign and formally consolidate his supporters outside mainstream Congress structures.