Benign tumour is the one which

The correct answer is "differentiated and capsulated".

To understand why this is the correct option, let's break down the characteristics of a benign tumour step-by-step:

1. Differentiated (Cellular Differentiation):
Benign tumour cells are well-differentiated. This means that the tumour cells closely resemble the normal, mature cells of the tissue from which they originated. They retain their specialized structure and functional characteristics, unlike malignant (cancerous) cells which are often undifferentiated (anaplastic) and look abnormal.

2. Capsulated (Presence of a Capsule):
Benign tumours are typically surrounded by a protective outer sleeve or fibrous connective tissue sheath known as a capsule. This encapsulation keeps the tumour localized, prevents it from invading neighboring tissues, and makes it relatively easy to remove surgically.

3. Absence of Metastasis:
Unlike malignant tumours, benign tumours do not show metastasis (the spread of cancer cells to distant parts of the body). They remain confined to their original site.

Therefore, a benign tumour is characterized as being differentiated and capsulated.