1) The equation of the plane which bisects the angle between the planes 3x - 6y + 2z + 5 = 0 and 4x - 12y + 3z- 3 = 0 which contains the origin is A) 33x - 13y + 32z + 45 = 0 B) x - 3Y + z - 5 = 0 C) 33x + 13y + 32z + 45 = 0 D) None of these Answer: Option DExplanation:Equation of plane bisecting the angle containing origin is (making constant term of same sign) −3x+6y−2z−5√32+62+22 = +4x−12y+3z−3√42+122+32 or −3x+6y−2z−57=4x−12y+3z−313 or 67x - 162y+ 47z + 44 = 0