ANSWER: Sardar Vallabhai Patel
Explanation:
National Unity Day was observed across India on 31st October 2015 for commemorating the birthday of S. V. Patel on the occasion of his 140th birth anniversary. the PM also flagged off a Run for Unity at New Delhi’s Rajpath on this occasion. Day was observed in several other states as well. The government in October 2014 declared 31 October as Rashtriya Ekta Diwas or National Unity Day to mark the birth anniversary of India's first home minister Sardar Vallabhbhai Patel.
