The ratios of the laminar hydrodynamic boundary layer thickness to thermal boundary layer thickness of flows of two fluids P and Q on a flat plate are 12 and 2 respectively. The Reynolds number based on the plate length for both the flows is 10^4. The Prandtl and Nusselt numbers for P are 18 and 35 respectively. The Prandtl and Nusselt numbers for Q are respectively A. 8 and 140 B. 8 and 70 C. 4 and 70 D. 4 and 35

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