Concept: This question tests your knowledge of the composition and nature of the vitreous humour, a crucial component of the vertebrate eye.

Why (C) is correct: The vitreous humour is a transparent, jelly-like substance that fills the space between the lens and the retina of the eye. It is primarily composed of water (about 99%), but its gel-like consistency is due to the presence of collagen fibers and hyaluronic acid. These components give it the characteristics of a specialized mucoid connective tissue, providing structural support to the eyeball and helping to maintain its shape.

Why other options are wrong:

• (A) colloid: While it contains colloidal components, describing it solely as a colloid doesn't fully capture its structural nature as a tissue.
• (B) watery fluid: It is mostly water, but its gel-like consistency prevents it from being merely a 'watery fluid' like aqueous humour.
• (D) All of the above: Since options A and B are incomplete descriptions, this option is incorrect.

Common Mistake: Students often confuse vitreous humour with aqueous humour. Remember, aqueous humour is a watery fluid, while vitreous humour is a gel-like substance.

NEET Tip: Think of 'Vitreous' as 'Viscous' or 'Gel-like' to remember its consistency, contrasting it with the 'Aqueous' (watery) humour.

Correct Answer: (C)