The correct option is B Hibiscus cannabinus
Kenaf or Hibiscus cannabinus, is a plant in the Malvaceae family. Hibiscus cannabinus is in the genus Hibiscus and is probably native to southern Asia, though its exact natural origin is unknown. The name also applies to the fiber obtained from this plant. Kenaf is one of the allied fibers of jute and shows similar characteristics. Alcea rosea is an ornamental plant in the Malvaceae family. Malvestrum tricuspidatum and Malvaviscus arboreus belongs to family Malvaceae but they are not fiber yielding plants.
Therefore, the correct answer is option B.