Earlier in the day, Prime Minister Narendra Modi, Defence Minister Nirmala Sitharaman and the three Service chiefs — Gen. Bipin Rawat, Admiral Sunil Lanba and Air Chief Marshal Birender Singh Dhanoa — visited Singh at the hospital.
Educated at Montgomery, British India (now in Pakistan), he had joined the RAF College, Cranwell in 1938 and was commissioned as a Pilot Officer in December the following year.
Singh had led an IAF squadron into combat during the 1944 Arakan Campaign and was awarded the Distinguished Flying Cross (DFC) that year.
Field Marshals Sam Manekshaw and K M Cariappa of the Army were the two other officers with a five-star rank.
After his retirement from the air force, Singh was appointed as the India's Ambassador to Switzerland in 1971 and concurrently served as the Ambassador to the Vatican.
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