Math Chapter Wise The Line And General Equation Of Second Degree And Its Classification English MCQ UKPSC Lecturer (Mains) 2020 Q.If P(1,2), Q(4,6), R(5,7) and S(a,b) are the vertices of a parallelogram PQRS, then (a,b)= A(2,4) B(3,4) C(2,3) D(3,5) Show answer Correct answer: (2,3)