Math Chapter Wise Tangent, Normal, Increasing, Decreasing And Maxima/Minima Of A Function Of One Variable English MCQ UP PGT 2004,2016 UKPSC GIC 2018 Rajsthan TGT 2013 Q.If the line ax + by + c = 0 is normal to the curve xy = 1, then Aa > 0, b > 0 Ba >0, b < 0 Ca < 0, b < 0 DNone of these Show answer Correct answer: a >0, b < 0