The Indian National Congress agreed to the partition of the country in 1947 mainly to avoid large-scale communal riots. Let`s dissect each option for better understanding:

Option 1: The principle of two-Nation theory was not initially acceptable to the Congress. This theory, proposed by the Muslim League, argued that Hindus and Muslims constitute two different nations. Congress, advocating for a united India, initially negated this theory.

Option 2: Though the British indeed played a significant role in the partition process, saying that the Congress was helpless would be an overstatement. Despite the pressure involved, the Congress still had the capacity to make decisions.

Option 3: Given the extreme tensions between Hindus and Muslims, it was feared that maintaining unity would lead to prolonged communal violence. Thus, partition was seen as the lesser of two evils, which accurately indicates why Congress consented to the partition.

Option 4: While gaining independence was a priority, it wasn`t the primary reason for the agreement to partition. The decision was more driven by the desire to avoid communal conflict than the fear of missing the opportunity to attain freedom.