[" The differential equation of the family of circles wib "],[" fixed radius "5" units and centre on the line "y=2" is: "],[[" (A) "(x-2)^(2)y^(prime2)=25-(y-2)^(2),],[" (B) "(x-2)y^(prime2)=25-(y-2)^(2)],[" (C) "(y-2)y^(prime2)=25-(y-2)^(2)],[" (D) "(y-2)^(2)y^(prime2)=25-(y-2)^(2)," (A.I.E.E.E.208) "]]