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A point (x,y) in the first quadrant lies...

A point (x,y) in the first quadrant lies on a line with intercepts (a,0) and (0,b) where a,b>0 .Rectangle M has vertices `(0,0)`,`(x,0)`,`(x,y)` and `(0,y)` while rectangle N has vertices `(x,y)`,`(x,b)`,`(a,b)` and `(a,y)` .The ratio of the area of M to that of N is
1) `1`
2) `2`
3) `(1)/(2)`
4) dependent on the value of a,b,x and y

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