The correct option is C January 15
The Army Day is celebrated every year by the Indian Army on January 15 to commemorate the day when General (later Field Marshal) K.M Carriappa took over the command of Army from General Sir Francis Butcher, the last British Commander-in-Chief in 1949 and became the first Commander-in-Chief of Indian Army post Independence. The day is also celebrated to remember the sacrifices made by the gallant soldiers and to pay homage to the martyrs. This year, in 2018, the 70th edition of Army Day was celebrated on Jan 15. On this occasion, Army Chief General Bipin Rawat, Chief of the Naval Staff Sunil Lanba and Air Chief Marshal Birender Singh Dhanoa paid tributes at Amar Jawan Jyoti in Delhi.