Which of the following statements is/are true?A. Rigidity: It is the property of matter to maintain its shape even if external force work on it and solids show this property.B. Fluidity: It is the property of a substance to easily flow and allow change in its shape under external forces and this property is exhibited both by liquids and gasses.

• A. Only A is true
• B. A and B both are true
• C. A and B both are false
• D. Only B is true