Paid to NPS on 31st March and allotment in next year Is deduction valid ?

Nikhil Patil ( A CA student )     30 March 2021

I made payment to NPS on 31st March and Units of NPS will be alloted in next year i.e. after 31st March so will it be counted towards the deduction of 80CCD(1B) of the year of payment ? Suggest relevant case laws it any.