Math Chapter Wise Conic Section English MCQ PGT 2011 Q.If the equation ax2 +2hxy+by2 +2gx+2fy+c=0 represents a circle then the condition will be: Aa = b and c = 0 Bf = g and h = 0 Ca = b and h = 0 Df = g and c = 0 Show answer Correct answer: a = b and h = 0