If pqr = 0 , qrs = 0 , and spr = 1, which of the following must be zero? Choose the correct choice from the following options.
A) P
B) Q
C) R
D) S
E) T
prs = 1 which means neither p / r/s is 0   rsx q = 0 , we know r and s are is not 0 from above hence q must be 0.   q x p x r = 0, we know from first expression that p and r are not 0 hence q =0.   option Q
<result>B</result>
If pqr = 0 , qrs = 0 , and spr = 1, which of the following must be zero?