Choose the incorrect couplet.

Compound leaves and reticulate venation deal with different characters. Compound leaf is type of leaf and reticulate venation is type of venation. Actinomorphic and zygomorphic flowers are related to symmetry of flower, Reticulate and parallel venation are related to venation, tap root system and adventitious root system and tap root system are related to type of root system.  A couplet should have contrasting traits belonging to same character.