Well this is what I think..
Stat 1- P is greater than 50 so values can be 51,52 or even 1000.Moreover nothing about Q is given so INSUFFICIENT.
Stat 2 - Q has values from 1 to 19.Again nothing about P is given so INSUFFICIENT.
Combining the statements we know that Q's values are from 1 to 19 inclusive and P is always greater than 51.
Lets select two values for P and Q
P=51
Q=19
then, R=Q/P would give R=19/51=0.37 so R is not equal to P
Since 19 is the maximum value for Q the numerator will always be smaller than the denominator and hence R can never be equal to P. So answer is C.
But I have a weird feeling about this question.Is it right??
Maxx