Pick out the correct statement

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Pick out the correct statement.

A. 1 kcal/hr.m.°C is equal to 1 BTU/hr. ft.°F

B. In steady state heat conduction, the only property of the substance which determines the temperature distribution, is the thermal conductivity

C. In unsteady state heat conduction, heat flows in the direction of temperature rise

D. In heat transfer by forced convection, Grashoff number is very important

Answer: Option B

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