Answer : The correct option is,
A solid : a definite volume and a definite shape.
Explanation :
As we know that there are 3 states of matter :
Solid state : It is defined as a state in which the particles are closely packed and does not have any space between them. This state have a definite shape and volume. For example : iron metal
Liquid state : It is defined as a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state have a definite volume but does not have a fixed shape. For example : water
Gaseous state : It is defined as a state in which the particles are loosely arranged and have a lot of space between them. This state have indefinite volume as well as shape. For example : Any type of gas like, helium gas.
Hence, the correct answer is, a solid has a definite volume and a definite shape.