In Relation puzzle type, mutual blood relations or other information of more than two persons are mentioned and information about any two is mentioned.
Q`s mother is sister of P and daughter of M. S is daughter of P and sister of T. How is M related to T ?
S is daughter of P and sister of T. So,T is daughter of P.
Now, the sister of P is the daughter of M.
This means that P is also the daughter of M.
Clearly, T is the grand daughter of M.
So, M is the Grandfather or Grandmother of T.