The corneal epithelium is the outermost layer of the cornea. It is composed of a single layer of basal cells and 4-5 cell layers of nonkeratinized, stratified squamous epithelial cells, which are held together by tight junctions, to form an effective barrier against fluid loss and pathogen penetration.

The correct answer is option 'A': Non-keratinised stratified squamous.

Epithelial lining of the cornea is composed of a non-keratinised stratified squamous epithelium. The cornea is the transparent front part of the eye, responsible for refracting light and protecting the inner structures of the eye. The corneal epithelium is a thin layer of cells that covers the outer surface of the cornea and plays a crucial role in maintaining its transparency and integrity.

The epithelium of the cornea is stratified, meaning it is composed of multiple layers of cells. The cells in the corneal epithelium are squamous in shape, meaning they are flat and scale-like. However, unlike the keratinised stratified squamous epithelium found in the skin, the corneal epithelium is non-keratinised.

The non-keratinised nature of the corneal epithelium is important for its function. Keratinisation is the process by which cells produce a tough, protective protein called keratin. In the skin, keratinisation helps to provide a barrier against mechanical trauma, pathogens, and dehydration. However, in the cornea, keratinisation would interfere with its transparency and optical properties.

The non-keratinised stratified squamous epithelium of the cornea allows for the passage of light through the cornea without scattering or absorption. It also helps to protect the underlying corneal layers from damage and dehydration. The cells in the corneal epithelium are tightly packed together, forming a barrier against pathogens and foreign substances.

In conclusion, the epithelial lining of the cornea is composed of a non-keratinised stratified squamous epithelium. This type of epithelium allows for the passage of light and provides protection to the underlying corneal layers.