Statement (I): In short open-belt drives, an idler pulley is used in order to increase the angle of contact on the smaller pulley for higher power transmission.Statement (II): The idler pulley facilitates changing the speed of the driven shaft, while the main or driving shaft runs at constant speed.

• A. Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (1)
• B. Both Statement (-) and Statement (II) are individually true tut Statement (II) is NOT the correct explanation of Statement (1)
• C. Statement (I) is true but Statement (II) false
• D. Statement (I) is false but Statement (II) is true he