Pick Out the Wrong Statement

Pick out the wrong statement.

A) 'Solvates' are chemical compounds formed by solute with their solvents. When water is the solvent, then it is called a 'hydrate'
B) In heat exchanger calculations (?t) weighted is used in place of ?t, when it involves more than one sequence of heating or cooling i.e., desuperheating & condensation or condensation & sub-cooling
C) Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted
D) In case of short tube vertical evaporators, area of central downtake is about 50 to 100% of the total tube cross-sectional area