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Which of the following solutions have th...

Which of the following solutions have the same concentration?

A

20g of `NaOH` in 200mL of solution

B

0.5 mol of `NaCI` in `200mL` of solution

C

40g of `NaOH` in `100mL` of solution

D

20g of `KOH` is `200mL` of solution

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The correct Answer is:
A
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