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In case the hydrodynamic and thermal boundary layers are identical for a fluid flowing over a heated plate

[A].	The plate must be of low thermal conductivity	[B].	The plate surface must be smooth
[C].	The value of Prandtl number thust be 1	[D].	The value of Prandtl number must be zero
[E].	The value of Prandtl number must be 0.5

Answer: Option C