[" 40.The distance between the foci of a "],[" hyperbola is "16" units and its eccentricity "],[" is "sqrt(2)" .Its equation is "],[[" (a) "x^(2)-y^(2)=32],[" (b) "2x^(2)-y^(2)=32],[" (c) "x^(2)-2y^(2)=32],[" (d) "3x^(2)-3y^(2)=32]]