Pick Out the Wrong Statement

Pick out the wrong statement.

A) Fluid movement under the influence of buoyant forces resulting from change in density takes place in case of natural convection
B) The ratio NNu/NRe . N_Pr is called the Stanton number
C) The Peclet number is a measure of the ratio of energy transport by convection to that by conduction
D) The Colburn jH factor for heat transfer is given by Nst N_Pr