The function \(\rm f(x)=\left\{\begin{matrix}x^2/a,&0≤ x≤1\\\ a&1 ≤ x ≤\sqrt2\\\ (2b^2-4b)/x^2,&\sqrt2≤ x<∞\end{matrix}\right.\) is
Continuous for 0 ≤ x < ∞, then the most suitable values of a and b are
1
a = 1, b = -1
2
a = -1, b = 1 + √2
3
a = -1, b = 1
4
None of these