Explanation:

All statements are correct.

Sardar Vallabhbhai Patel

• He was born on 31st October 1875 in Nadiad, Gujarat.

• Sardar Patel was the first Home Minister and Deputy Prime Minister of India. Hence, statement 1 is correct.

• He is recognized as the real unifier of India for his colossal contribution to integrate and make India a united (Ek Bharat) and an independent nation.

• He requested the people of India to live together by uniting in order to create Shresth Bharat (Foremost India).

• This ideology is still reflected in the Atmanirbhar Bharat initiative which seeks to make India Self-Reliant.

• He is also remembered as the ‘Patron saint of India’s civil servants’ as he established the modern all-India services system. Hence, statement 2 is correct.

• National Unity Day is celebrated every year on 31st October to commemorate the birth anniversary of Sardar Vallabhbhai Patel. It is also known as Rashtriya Ekta Diwas. 

Hence option 4th is correct.