Both transistor T1 and T2 in figure have a threshold voltage of 1V. The device parameters K1 and K2 of T1 and T2 are $$36 \mu A/V^2$$ and $$9 \mu A/V^2$$ respectively. The o/p voltage $$V_0$$ is

A

1V

B

2V

C

3V

D

4V