Fibres of cotton are obtained from

Correct option is C

Solution
The correct option is seed coat.
About Cotton fibre:
· It is a very  Soft, Fluffy staple Fiber that Grows in a Protective Capsule or Ball like structure, around the  Seeds of Cotton plants of the genus  Gossypium in the family of Malvaceae. The  Fiber of Cotton is almost like a  Pure Cellulose.
· Under the  Natural conditions, the  Cotton Bolls will tend to  Increases in the Dispersion of the Seeds. It is a  seed Hair fibre produced from the  Epidermal Seed Coat. These  Fibers are not obtained from Stem Hairs, Root Hairs, or Leaf of Cotton Plant.
· The  Cotton Plant is a Shrub Native to Tropical and Subtropical regions around the world, including  countries like the Americas, Egypt, Africa, and India. 
· The  greatest Diversity of Wild Cotton Species is found in Mexico, followed by Africa and Australia.  Cotton was independently domesticated in the  Old times and very much diversified in New Worlds.
· India is the  world's Largest Producer of Cotton. In  Asian countries like India and Pakistan (less than 2%) Gossypium Arboreum types of  Cotton Plants are found.