Who played an important role in bringing all the states in the independent India into the country's unity?

Answer: Option A

Vallabhbhai Patel is the single most important reason that we have inherited the India that we have today – the political and geographic landmass we call India, without which there can be no 'idea of India'. Sardar Patel played an important role in bringing all the states in the independent India into the country's unity.