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Which of the following is / are CORRECT ...

Which of the following is / are CORRECT
(A) If the points A`(x,y+z)`, B`(y,z+x)` and C`(z,x+y)` are such that `AB=BC` , then x, y, z are in A.P.
(B) If a line through the variable point A`(k+1, 2k)` meets the lines ,`7x+y-16=0` , `5x-y-8=0`,`x-5y+8=0` at `B`, `C` and `D` Respectively, then `AC` , `AB` and `AD` are in H.P.

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