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If |(x^2+4x, x-1, x+3),(2x, 3x-1, 5x-1),...

If `|(x^2+4x, x-1, x+3),(2x, 3x-1, 5x-1),(6x-1, 4x, 8x-2)|=ax^4+bx^3+cx^2+dx+k` be an identity in x and f(x) is a continuous function which attains ony rational values and `f(0)=a, then f(x)=4` (A) for no value of x (B) for all values of x (C) ony for finite number of values of x (D) ony for all non zero values of x

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