[" In the following circuit,bulb rated as "1.5%,0.45],[W" .If bulbs glows with full intensity then what "],[" will be the equivalent resistance between "X" and "Y],[" (a) "0.45Omega,6V/s],[" (b) "1Omega," 3"C" ."],[" (c) "3Omega],[" (d) "5n]