Let `4x^(2)-4(alpha-2)x + alpha-2=0(alpha in R)` be a quadratic equation. Find the values of `alpha` for which, Atleast one root is positive

Options

A. `alpha in (-oo,2]uu[3,oo)`
B. `alpha in (-oo,2]uu(3,oo)`
C. `alpha in (-oo,-2]uu(3,oo)`
D. `alpha in (-oo,2)uu(3,oo)`

Answer

B