Given below are two statements: one is labelled Assertion (A) and other is labelled Reason (R).

Assertion (A): Adipose and areolar tissues are categorised under loose connective tissue. 

Reason (R): Cells and fibres are loosely arranged in a semi-fluid ground substance in both these tissues.

In the light of above statements, choose the correct answer from the options given below.

Assertion (A) is correct. Adipose tissue and areolar tissue are both examples of loose connective tissue. Loose connective tissue is characterised by its relatively loose arrangement of cells and fibers within a gel-like or semi-fluid ground substance. Adipose tissue contains adipocytes (fat cells) that store fat, and areolar tissue contains various cell types, fibers, and a ground substance.

Reason (R) is also correct. In both adipose and areolar tissues, cells (adipocytes or other cell types) and fibers (such as collagen and elastic fibers) are loosely arranged within a semi-fluid ground substance. This arrangement provides flexibility, support, and space for blood vessels and nerves.

In this case, both the assertion (A) and reason (R) are correct, and the reason explains why the assertion is true.