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A line is a drawn from P(4,3) to meet th...

A line is a drawn from `P(4,3)` to meet the lines `L_1 and l_2` given by `3x+4y+5=0 and 3x+4y+15=0` at points `A and B` respectively. From `A` , a line perpendicular to `L` is drawn meeting the line `L_2` at `A_1` Similarly, from point `B_1` Thus a parallelogram `AA_1 B B_1` is formed. Then the equation of `L` so that the area of the parallelogram `AA_1 B B_1` is the least is (a) `x-7y+17=0` (b) `7x+y+31=0` (c) `x-7y-17=0` (d) `x+7y-31=0`

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