38.  For the n-channel MOS transistor sho...

38.  For the n-channel MOS transistor shown in the figure, the threshold voltage VTh is 0.8 V. Neglect  channel length modulation effects. When the drain voltage VD = 1.6 V, the drain current ID was  found to be 0.5 mA. If VD is adjusted to be 2 V by changing the values of R and VDD, the new value  of ID (in mA) is

(A) 0.625 

(B) 0.75 

(C) 1.125 

(D) 1.5

Hint: 

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