In Einstein's mass-energy equivalence relation E = mc2, 'c' stands for

1.	In Einstein's mass-energy equivalence relation E = mc2, 'c' stands for?
A.	Planck constant
B.	elementary charge
C.	atomic mass constant
D.	speed of light
Answer» E.

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In Einstein's mass-energy equivalence relation E = mc2, 'c' stands for?

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