The equation `2x^2+4xy-py^2+4x+qy+1=0` will represent two mutually perpendicular straight lines , if

The equation 2x^(2)-3xy-py^(2)+x+qy-1=0 represent two mutually perpendicular lines if

The equation 2x^(2)-3xy-py^(2)+x+qy-1=0 represent two mutually perpendicular lines if

If 2x^(2)+4xy-py^(2)+4x+qy+1=0 represents a pair of mutually perpendicular lines then

If the equation 12x^(2)+7xy-py^(2)-18x+qy+6=0 represents a pair of perpendicular straight lines, then

If the equation 12x^(2)+7xy-py^(2)-18x+qy+6=0 represents a pair of perpendicular straight lines, then

If the equation 12x^(2)+7xy-py^(2)-18x+qy+6=0 represents a pair of perpendicular straight lines, then

If the equation 12x^(2)+7xy-py^(2)-18x+qy+6=0 represents a pair of perpendicular straight lines, then

If the equation 2x^(2)-3xy-py^(2)+x+qy-1=0backslash(p,q in I) represents two mutually perpendicular lines, then (A) p^(2)+q^(2)=13 (B) p-q=5(C)p^(2)-q^(2)=1(D)p+q=5

Prove that the equation 2x^(2)+3xy-2y^(2)-x+3y-1=0 represents a pair of perpendicular straight lines.