What is the significance of Einstein's famous equation E = mc2

Physicist Albert Einstein derived an equation (E=mc2) by the twentieth-century, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.

This is an incomplete question, here is a complete question.

What is the significance of Einstein's famous equation E = mc²?

A. Energy is not related to mass.

B. Mass can be destroyed.

C. Energy can be destroyed.

D. Mass and energy can convert to one another.

Answer : The correct option is, (D) Mass and energy can convert to one another.

Explanation:

The Einstein's equation is:

E = m * c²

where,

E = energy

m = mass of an object

c = speed of light

From the given formula we conclude that, mass is directly related to mass of an object that means energy and mass are interchangeable.

Hence, the significance Einstein's equation is, the mass and energy can convert to one another.