If ∆ = |\begin{array}{cccc}3 & 4 & 5 & x\ 4 & 5 & 6 & y\ 5 & 6 & 7 & z\ x & y & z & 0\end{array}|= 0 then

Correct Answer is : x,y,z are in A.Px,y,z are in A.P

x,y,z are in A.Px,y,z are in A.P