Which of the following is not a type of fruit?
Berry
Nut
Legume
Petal
Petals are a part of the flower, not the fruit. The question is to identify the one which is not a fruit, petal is not fruit among the given options. Hence option D is the correct answer.
Option(A) Berry is a small fruit with a juicy ovary wall. It is a fleshy fruit. Examples of berries include strawberry, raspberry etc. Hence option A is incorrect.
Option(B) Nut is dry fruit with a single seed and oil content. Hence option B is incorrect.
Option(C) A dry fruit with several seeds is called the legume. Hence option C is incorrect.