The correct option is D Peanut
The peanut or groundnut (Arachis hypogaea) is a species in the family Fabaceae. The peanut was probably first domesticated and cultivated in the valleys of Paraguay. So, Arachis hypogea is peanut and not walnut (Juglans regia), coconut (Cocos nucifera) and cashew nut (Anacardium occidentale).
Therefore, the correct answer is option D.