Doubt in direct cache mapping

Question

The direct mapped cache uses M main memory blocks and N cache blocks, for a given Physical Address it resulted T tag bits and placed in P cache block. Which main memory words May respond to this Physical Address? Block size is P words.

Comments

here you have not given detail about which word you want to access from selected block in cache 

your physical address is incomplete if no of word in block>1

tag bit

index

block offset

your tag bit is t

index bit =binary representation of log(p)

you have not given any detail about block offset which is required if no of word in a block=1 then block offset not required but in other case it required