The pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is p. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be

• A. p
• B. 2 p
• C. p
• D. ²
• E. p/2