A (6,2)
B (3,1)
C (5,1)
D (4,0)
Correct Answer: Option D
here, x-y=4 …..(i) x+3y= 4….(ii) by doing (i)-(ii), x-y-x-3y = 4-4 or,-4y =0 or y=0/4 or,y=0 so, x-y=4 or,x=4+0 so,x=4
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