Mathematics
If \(a,b,c,d\) and \(p\) are distinct real numbers such that
\(\left( a^{2} + b^{2} + c^{2} \right)p^{2} - 2(ab + bc + cd)p + \left( b^{2} + c^{2} + d^{2} \right) \leq 0\)
then \(a,b,c,d\)
A
are in A.P
B
are in G.P
C
are in H.P
D
satisfy \(ab = cd\)
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