Let p, q and r be three distinct positive real numbers. If D= vmatrix p&q&r &r&p &p&q vmatrix , then which one of the following is correct?

NDA 2020 Mathematics question

Let p, q and r be three distinct positive real numbers. If , then which one of the following is correct?

Answer: (A)

Expanding, p^3q^3r^3r)(p^2q^2r^2$-pq-qr-rp) =

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Question ID VK-029219