Which of the molecule is/are Lewis base as well as Bronsted acid?

Options

A. `C_(2)H_(5)OH`
B. `H_(2)O`
C. `NH_(3)`
D. All of the above

Explanation

To determine which molecules are both Lewis bases and Brønsted acids, we need to understand the definitions of these terms:

1. **Lewis Base**: A Lewis base is a substance that can donate a lone pair of electrons to form a covalent bond.
2. **Brønsted Acid**: A Brønsted acid is a substance that can donate a proton (H⁺ ion).

Now, let's analyze the given molecules one by one:

### Step 1: Analyze C2H5OH (Ethanol)
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