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Which of the four test tubes containing ...

Which of the four test tubes containing the following chemicals shows the brisk effervescence when dilute acetic acid was added to them?
i) KOH
ii) `NaHCO_3`
iii) `K_2 CO_3`
vi) `NaCl`

A

I & ii

B

ii & iii

C

i & iv

D

ii & iii

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