The correct option is C Arachis hypogea
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. It is an annual herbaceous plant growing 30 to 50 cm tall. Because, in botanical terms, nut specifically refers to indehiscent fruit, the peanut is not technically a nut, but rather a legume. Peanuts are often served in a similar manner to true nuts in many Western cuisines, and are often referred to as a nut in common English.
Thus, the correct answer is option C.