Hi Ranjeet,
I agree with previous statements from Fayiqa Naqshbandi, Gokul Boro, and SAHIL SINGH. but first you need to know how to calculate the frequency spacing, then the subcarrier frequency will be as mention before
frequency spacing (dalta F)= Bit rate/(log2(M)*Nsc)
where the M is the M-array of the modulation, and Nsc is the number of subcarriers
hopefully this help you.
Kind regards
Mohamed