Product of Renold number, Froud's number and Mach number is :

• A. <img src="/_files/images/civil-engineering/hydraulics/160-7.245-1.png">
• B. <img src="/_files/images/civil-engineering/hydraulics/160-7.245-2.png">
• C. <img src="/_files/images/civil-engineering/hydraulics/160-7.245-3.png">
• D. <img src="/_files/images/civil-engineering/hydraulics/160-7.245-4.png">