Who signed the Tashkent Agreement in 1966 on behalf of India?

The Tashkent Agreement was a peace treaty signed between India and Pakistan on January 10, 1966, to resolve the Indo-Pakistani War of 1965. India was represented by its then Prime Minister, Lal Bahadur Shastri, who tragically passed away in Tashkent shortly after signing the agreement. Pakistan was represented by President Ayub Khan. Jawaharlal Nehru (A) died in 1964, before the agreement. Indira Gandhi (C) became Prime Minister later in 1966. Rajiv Gandhi (D) served much later. Therefore, Lal Bahadur Shastri is the correct signatory for India.