The emissivity and the surface area of filament of electric bulb are 0.7 and \[5\times {{10}^{-5}}{{m}^{2}}\]. The operating temperature of the filament is 3000 K. The power of the bulb is approximately \[[\sigma =5.67\times {{10}^{-8}}watt/{{m}^{2}}-{{K}^{4}}]\]

• A. 230 W
• B. 160 W
• C. 9000 W
• D. 4150 W