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The lines joining the origin to the point of intersection of The lines joining the origin to the point of intersection of `3x^2+m x y=4x+1=0` and `2x+y-1=0` are at right angles. Then which of the following is not a possible value of `m ?` `-4` (b) 4 (c) 7 (d) 3

A

`lamda=-4`

B

`lamda = 4`

C

`lamda = 7 `

D

no value of `lamda`

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A,B,C
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