Quills or Flight feathers: Theses are strong and possess a central axis or main stem, quill or calamus and distal expanded portion called vexillum or vanae.
Types of Quills: These are three types.
Remiges: Flight feathers of wings.
Rectrices: Rectrices or tail quills are arranged in a semi-circle fan like manner.
Coverts: There are two sets of coverts.
Contour feather: These feather constitute the general covering of the body.
Filoplumes: Pin feathers or hair feathers). These are small, delicate, hair like feathers remain sparsely distributed all over the body.
Plumules: These feathers are very small, soft and wooly which are without rachis or shaft. The barbs are long, flexible with short barbules.
Therefore, the correct answer is option B.