The correct option is B commensalism
The interaction in which one species benefits and the other is neither harmed nor benefited is called commensalism. For example - an orchid growing as an epiphyte on a mango branch.
The interaction in which both the species benefit from each other is called mutualism. For example - mycorrhizae association between fungi and the roots of higher plants.
Parasitism is a type of relationship between species where one organism (the parasite) lives on or inside another organism (the host) causing it harm. Example - human liver fluke and human.
Predation is an interaction where one species (the predator), kills another species (the prey) for its benefits. Example - tiger and deer.