A. The National Song Vande Mataram was composed by Bankim Chandra Chatterji originally in Bengali
B. The National Calender of India based on Saka era has its 1st Chaitra on 22nd March normally and 21st March in a leap year
C. The design of National Flag of India was adopted by the Constitution Assembly on 22nd July, 1947
D. The song 'Jana Gana Mana' composed originally in Begali by Rabindranath Tagore was adopted in its Hi