The correct option is
D Gibbon
Gibbons occur in tropical and subtropical rainforests from eastern Bangladesh and north east India to southern China and Indonesia (including the islands of Sumatra, Borneo, and Java). Depending on species and sex, gibbons' fur coloration varies from dark to light brown shades, and any shade between black and white. Seeing a completely "white" gibbon is rare.
The hoolock gibbons, are two primate species of genus Hoolock in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India and Southwest China.
Hoolocks are the second-largest of the gibbons, after the siamang. In northeast India, the hoolock is found south of Brahmaputra and east of the Dibang Rivers. Its range extends into seven states covering Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura (the seven north eastern states of India)
So, the correct answer is 'Gibbon'