Which of the following is a parthenocarpic for jam making grape variety

Answer: Option C

Black corianth is a parthenocarpic variety of grapes used for making jams.
Black Corinth is one of the varieties of grapes, in this pollination and fertilization take place but the embryo gets aborted subsequently resulting in seedlessness. This phenomenon of development of seedless fruits is referred to as ‘parthenocarpy’.
The seedlessness or parthenocarpic fruits are advantageous since there is a greater preference among the consumers for seedless fruits and especially for making jams.