The following equilibrium is established when `HC1O_(4)` is dissolved in weak acid `HF`,
`HF+HClO_(4)hArrClO_(4)^(-)+H_(2)F^(+)`
Which of the following is correct set of conjugate acid base pair?

Options

A. `HF` and `HCIO_(4)`
B. `HF` and `CIO_(4)^(-)`
C. `HF` and `H_(2)F^(+)`
D. `HCIO_(4)` &`H_(2)F^(+)`

Explanation

To solve the problem of identifying the correct set of conjugate acid-base pairs from the given equilibrium reaction:

**Equilibrium Reaction:**
\[ HF + HClO_4 \rightleftharpoons ClO_4^- + H_2F^+ \]

### Step-by-Step Solution:

1. **Identify the Acids and Bases:**
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