When was 1973 constitution enforced?

a) 23rd March 1973

b) 6th September 1973

c) 14th August 1973

d) 1st May 1973

This constitution of 1973 was passed by assembly on April 10, 1973, and it came into effect on 14 August 1973. This constitution consists of 280 articles and 7 schedules.