MathematicsEasy92×since 2002Q4685If the common tangent to the parabolas, y² = 4x and x² = 4y also touches the circle, x² + y² = c², then c is equal to :A12{1 \over {\sqrt 2 }}21B122{1 \over {2\sqrt 2 }}221C12{1 \over 2}21D14{1 \over 4}41Check answerSkip