For maximum power transmission through a nozzle, (where hf is the head lost due to friction)

• A. <img src="/_files/images/civil-engineering/hydraulics/162-7.279-1.png">
• B. <img src="/_files/images/civil-engineering/hydraulics/162-7.279-2.png">
• C. <img src="/_files/images/civil-engineering/hydraulics/162-7.279-3.png">
• D. <img src="/_files/images/civil-engineering/hydraulics/162-7.279-4.png">