Which of the following statements is correct?

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(C) The correct statement is $C$. $1$. Columnar epithelium cells have nuclei located at the base,not the top,and are found in the lining of the stomac

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Cuboidal epithelium cells are arranged in a single layer and are found in the ducts of glands.

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(C) The correct statement is $C$. $1$. Columnar epithelium cells have nuclei located at the base,not the top,and are found in the lining of the stomach and intestine. $2$. Squamous epithelium cells have irregular boundaries and a flattened nucleus,not a small nucleus with regular boundaries. $3$. Cuboidal epithelium consists of cube-like cells arranged in a single layer,commonly found in the ducts of glands and tubular parts of nephrons in kidneys. $4$. Cuboidal epithelium cells are cube-shaped,not flattened (flattened cells are characteristic of squamous epithelium),and while they are found in the thyroid gland,the description of them being 'flattened' is incorrect.

$(a)$ Tight junctions	$(i)$ Cement neighbouring cells together to form a sheet
$(b)$ Adhering junctions	(ii) Transmit information through chemicals to other cells
$(c)$ Gap junctions	(iii) Establish a barrier to prevent leakage of fluid across epithelial cells
$(d)$ Synaptic junctions	(iv) Cytoplasmic channels to facilitate communication between adjacent cells

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