Correct Answer: B

Rationale: Albert Einstein proposed the theory of relativity, which fundamentally changed our understanding of space, time, and gravity. His Special Theory of Relativity (1905) introduced the famous equation E=mc², establishing the relationship between mass and energy. Later, his General Theory of Relativity (1915) described gravity not as a force but as the curvature of spacetime caused by massive objects. These theories revolutionized physics, influencing cosmology, black hole research, and modern GPS technology. Einstein’s contributions remain central to modern theoretical and applied physics.

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