Human eyeball consists of three layers and it encloses
(a) Lens, iris, optic nerve
(b) Lens, aqueous humor, and vitreous humor
(c) Cornea, lens, iris
(d) Cornea, lens, optic nerve
The answer is option (b) Lens, aqueous humor, and vitreous humor
Explanation: The human eyeball has three layers- sclera, choroid and retina. These three layers enclose lens, aqueous humor and vitreous humor.