JEE Main 20207 Jan, Morning shiftMathematicsEasyCoordinate Geometry478× since 2002If y = mx + 4 is a tangent to both the parabolas, y² = 4x and x² = 2by, then b is equal to :AOption A. -128BOption B. 128COption C. -64DOption D. -32CheckSkip · show solution