Assertion: The `alpha`-hydrogen atom is carbonyl compounds is less acidic.
Reason: The anion formed after the loss of `alpha`-hydrogen atom is resonance stabilised.

Options

A. Assertion and reason both are correct and reason is correct explanation of assertion.
B. Assertion and reason both are wrong statement.
C. Assertion is correct statement but reason is wrong statement.
D. Assertion is wrong statement but reason is correct statement.

Explanation

To analyze the given assertion and reason regarding the acidity of alpha-hydrogens in carbonyl compounds, we can break down the problem into clear steps:

### Step 1: Understand the Assertion
The assertion states that the alpha-hydrogen atom in carbonyl compounds is less acidic.

**Hint:** Consider the definition of acidity in terms of the ability to donate protons (H⁺ ions).

### Step 2: Analyze the Reason
The reason provided states that the anion formed after the loss of the alpha-hydrogen atom is resonance stabilized.

**Hint:** Recall what resonance stabilization means and how it affects the stability of anions.

### Step 3: Evaluate the Assertion
In carbonyl compounds, the alpha-hydrogen is indeed acidic. This is because when an alpha-hydrogen is removed, it forms an enolate ion, which is resonance stabilized.

**Hint:** Think about how the structure of the enolate ion allows for delocalization of the negative charge.

### Step 4: Conclusion on the Assertion
Since the alpha-hydrogen can be removed to form a stable anion, the assertion that alpha-hydrogens are less acidic is incorrect. Therefore, the assertion is false.

**Hint:** Remember that the strength of an acid is related to the stability of its conjugate base.

### Step 5: Conclusion on the Reason
The reason provided is correct because the anion formed after the loss of the alpha-hydrogen is indeed resonance stabilized, which contributes to its stability.

**Hint:** Consider how resonance structures can distribute charge and stabilize a negative charge.

### Final Conclusion
- **Assertion:** False (the alpha-hydrogen is actually acidic).
- **Reason:** True (the anion formed is resonance stabilized).

Thus, the correct answer is that the assertion is false, but the reason is true.