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[" 42.If the family of lines "lambda x+3...

[" 42.If the family of lines "lambda x+3y-6=0" ( "lambda" is variable) intersect the lines "x-2y+3=0" and "],[x-y+1=0" in "P" and "Q" ,then locus of the middle point of "PQ" is "],[[" (A) "4x+2y=1," (B) "x+y=2],[" (C) "2x-2y+4=0," (D) "4x+3y=4]]

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