The root that does not represent something edible is B. lav.
Lav root word means wash.
Examples: Lavabo - wash basin connected to the wall Lavadero - part of a stream where gold are washed from placers Lavandera - laundress; washerwoman Lavatory - a place where one can wash a. carn - latin in origin meaning flesh or meat. Representing something edible would be carnivorous. c. mel - latin in origin meaning very pure honey. d. sal - latin in origin meaning salt. Representing something edible would be salad, salami.