(a)

Differentiate between malignant and benign tumours.

(b)

Name and explain the most feared property of a malignant tumour.

| S. No. | Malignant tumor | Benign tumor |

|---|---|---| | $\displaystyle 1$ | Cells grow very rapidly and invade and damage the surrounding normal tissue. | Comparatively slow growth and remain confined to their original location and do not spread to other parts of the body | | $\displaystyle 2$ | Show metastasis | Do not show metastasis |