What is 450g of flour a measure of? a weight b inertia c gravity d mass

The correct answer is option D.

Explanation:

450 grams of flour is a measure of mass.

Mass is defined as amount of matter present in a object.

Weight is defined as the force exerted by the center of the earth on the object to attract it towards its center.

Inertia is defined as property of the body due to which continues its existing state of rest or motion in straight line , unless that state cahnged by any other external force.

Gravity is defined as a force which attracts the body to the center of the earth.

So, from the given options the correct answer is option D.