The birth anniversary of ______ was observed as ‘Rashtriya Ekta Diwas’ (National Unity Day) on 31^st October 2020.

Sardar Vallabhbhai Patel

The correct answer is Option (3) - Sardar Vallabhbhai Patel

The birth anniversary of Sardar Vallabhbhai Patel was observed as 'Rashtriya Ekta Diwas' (National Unity Day) on 31^st October 2020. Sardar Vallabhbhai Patel, also known as the Iron Man of India, was a key figure in the Indian independence movement and played a crucial role in the integration of princely states into the Indian Union after independence.