Evaluations for input

The pipe flow in Fig. P6.52 is driven by pressurized air in the tank. What gage pressure p_1 is needed to provide a 20°C water flow rate Q = 60 m^3/h? <image 1>

(A) 2.38E6 Pa

(B) 2.61E5 Pa

(C) 1.56E6 Pa

Answer with the option's letter from the given choices directly. No punctuation.