If \( a, b, c \) form an A.P. with common difference \( d(\neq 0) \) and \( x, y, z \) form a G....

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If \( a, b, c \) form an A.P. with common difference \( d(\neq 0) \) and \( x, y, z \) form a G.P. with common ratio \( r(\neq 1) \), then the area of the triangle with vertices \( (a, x),(b . y) \) and \( (c, z) \) is independent of
(a) \( a \)
(b) \( b \)
(c) \( x \)
(d) \( r \)
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