Rationalise the denominator and simplify 10/root 2

Rationalize the denominator and simplify: 10/√22

A) 10√22/2
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B) 10√2/√2

C) 10/2√2
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D) 10/√4

Answer:

B) 10√2/√2

Rationalise the denominator and simplify 10/root 2