Identify the incorrect statement.

• A

  Family Solanaceae and Convolvulaceae belong to order Sapindales.

• B

  Mammalia includes order Carnivora which includes animals like tiger, cat and dog. 

• C

   Higher the category, greater is the difficulty of determining the relationship to other taxa at the same level.

• D

  Human beings along with fishes are included in the phylum chordata.