Let f(x) be a polynomial function. If f(x) is divided by x-1, x+1 & x+2, then remainders are 5,3 and 2 respectively. When f(x) is divided by `x^3 +2 x^2 - x - 2`, then remainder is : (A) x - 4 (b) x + 4 (c) x-2 (d) x + 2