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1. $3 \times 10^{8} \times m s^{- 1}$

A. $2 \times 10^{8} m s^{- 1}$
B. $2 \times 10^{8} m s^{- 1}$
C. $2 \times 10^{8} m s^{- 1}$
D. $2 \times 10^{8} m s^{- 1}$

Answer: Option A

Explanation:

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