Q: If Δ = | p p² (p³ − 1); q q² (q³ − 1); r r² (r³ − 1) | = 0, in which p, q, r are different. The value of p q r is
(a)3
(b)1
(c)2·5
(d)3·5
Correct Answer: (a)
The correct answer is (b) '1'. This question from the General Studies domain tests knowledge of Miscellaneous.