In the following circuit, bulb rated as $1.5\, V$, $0.45\, W$. If bulbs glows with full intensity then what will be the equivalent resistance between $X$ and $Y$ ............. $\Omega$

121-42

  • A

    $0.45$ 

  • B

    $1$ 

  • C

    $3$ 

  • D

    $5$ 

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