President Sukarno of _______ was the Guest of Honour during India's first Republic Day event in 1950.

Correct option is A

The correct answer is (A) ​Indonesia​.

• The first Republic Day Parade was held on 26 January 1950, during which the President of Indonesia Sukarno was the chief guest.
• Between 1950 and 1954, Republic Day parades were held at Irwin Stadium (now National Stadium), Kingsway, Red Fort and Ramlila Maidan.
• Dr Rajendra Prasad began his first tenure as President of the Indian Union on this day.
• The President addresses the country on the eve of Republic Day.
• The republic day celebrations are majorly divided into three parts i.e. the Republic Day Parade, the Beating Retreat, and the Award Distributions.