Read the following (A - D) stetements :-
(A) Tight junctions help to stop substances from leaking across a tissue
(B) Adhering junctions perform cementing to keep neighbouring cells together.
(C) The simple epithelium consists of two or more cell layers and has protective function.
(D) The colunar epithelium is made of a single layer of flattend cells with irregular bounderies
How many of the above statements are correct