The most basic compound among the following is-

Options

A. Acetanilide
B. Benzylamine
C. p-Nitro aniline
D. Aniline

Answer

To determine the most basic compound among the given options, we need to analyze the basicity of each compound based on the presence of nitrogen with a lone pair and the influence of substituents on the nitrogen atom. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Compounds
List the compounds provided in the question. For this example, let’s assume the compounds are:
1. Acetanilide
2. Benzylamine
3. Para-nitroaniline
4. Aniline

### Step 2: Understand Basicity
Basicity refers to the ability of a compound to donate a lone pair of electrons. Compounds that can easily donate their lone pairs are considered stronger bases.

### Step 3: Analyze Each Compound
- **Acetanilide**:
- Contains a nitrogen atom with a lone pair.
- The lone pair is involved in resonance with the aromatic ring and is affected by an electron-withdrawing group (the acetyl group).
- This decreases its basicity.

- **Benzylamine**:
- Contains a nitrogen atom with a lone pair.
- The lone pair is not involved in resonance and there are no electron-withdrawing groups present.
- This allows it to easily donate its lone pair, making it a strong base.

- **Para-nitroaniline**:
- Contains a nitrogen atom with a lone pair.
- The lone pair is involved in resonance with the aromatic ring.
- Additionally, the nitro group (–NO2) is a strong electron-withdrawing group, which decreases the basicity.

- **Aniline**:
- Contains a nitrogen atom with a lone pair.
- The lone pair is also involved in resonance with the aromatic ring, which reduces its availability for donation.

### Step 4: Compare Basicity
Now, compare the basicity of the analyzed compounds:
- Acetanilide: Low basicity due to resonance and electron-withdrawing group.
- Benzylamine: High basicity due to free lone pair and absence of electron-withdrawing groups.
- Para-nitroaniline: Low basicity due to resonance and strong electron-withdrawing nitro group.
- Aniline: Low basicity due to resonance.

### Conclusion
The most basic compound among the given options is **Benzylamine**.

### Final Answer
**Benzylamine (Option B)** is the most basic compound.

---