In which Constitution of Pakistan Islamabad was confirmed as the capital of the country _____?

I appreciate his efforts, but do clear me that Islamabad became capital of Pakistan in 1960, however there was no any constitution in 1960.

There is no constitution in Pakistan which is passed in 1960, so correct answer is 1962

1962,,not 1960. please correct this mcq.thank you

admin plz correct the options.There is no constitution of 1960