I got D
because it is a right angle triangle
we can write it as Qps + pqs = prs + spr
now qps = qpr+spr
so we can re-write it as qpr + prs + pqs = prs +spr
or , prs - pqs = qpr
now from statement 1 we get the value of qpr = 30 degree.
so we can solve the problem
from statement 2 we get pqr + prq = 150.
PQR+ QRP+ QPR= 180
therefore qpr = 30. so it is sufficient.
answer should be D