Final answer:
The correct option is d). The membrane that lines the eyelids and covers the white of the eye is the conjunctiva, specifically the palpebral conjunctiva. It is separate from the fibrous tunic that comprises the sclera and cornea, and the vascular tunic that contains the choroid.
Step-by-step explanation:
The thin membrane that lines the eyelids and covers the white of the eye is known as the conjunctiva. This membrane is referred to as the palpebral conjunctiva when attached to the inner surface of the eyelids, and it extends over the sclera, connecting the eyelids to the eyeball. Its main function is to protect the eye from foreign particles, assisted by tears from the lacrimal gland.
The eye itself is composed of three layers, where the outer layer is called the fibrous tunic which includes the sclera and cornea but does not include the conjunctiva. The choroid forms the middle layer of the eye, also known as the vascular tunic, and is mainly responsible for providing a blood supply to the eyeball. It is posterior to the ciliary body and does not cover the sclera or inner eyelids.