In mango, the pericarp is well differentiated into an outer ....a..... epicarp, a middle ....b... mesocarp and an inner....c.... endocarp.
Complete sentence
In mango, the pericarp is well differentiated into an outer thin epicarp, a middle fleshy mesocarp and an inner stony hard endocarp.
Final answer
(c) a -thin, b-fleshy, c-stony hard