Pentadiplandra brazzeana, the source of sweetest protein is found in

Pentadiplandra brazzeana is a shrub found in west-central tropical Africa. Brazzein is a protein which is mainly found in the berries of the plant. It is one of the sweetest sugar. It is used as a sweetener in porridge. It is used as a low-calorie sweetener. The roots are hung to repel the snakes.

So, the correct answer is option B.