The correct option is C Rudimentary endocarp and fleshy mesocarp
In a banana, the rudimentary endocarp and fleshy mesocarp is the edible part. There is a protective outer layer with numerous long, thin strings (the phloem bundles), which run lengthwise between the skin and the edible inner portion. The inner part of the common yellow dessert variety can be split lengthwise into three sections that correspond to the inner portions of the three carpels by manually deforming the unopened fruit.
Thus, the correct answer is option C.