Both transistors T1 and T2 shown in the figure, have a threshold voltage of 1 Volts. The device parameters K1 and K2 of T1 and T2 are respectively, 36 µA/V2 and 9 µA/V2. The output voltage V0 is

A. 1 V
B. 2 V
C. 3 V
D. 4 V
Answer: Option C

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