Assertion(A) Acylation of amines gives a monsubstituted product whereas alkulation of amines gives polysubstitues product.
Reason(R ) Acyl group sterically hinders the apprach of further acyl group

Options

A. Both assertio and reason are worng
B. Both assertion and reason are correct statement but reason is not correct explaination of assertion.
C. Assertion is correct statements and reason is correct explanation of assertion.
D. Both asseration and reason are correct statements and reason is correct explanation of assertion .

Explanation

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided in the question regarding the acylation and alkylation of amines.

### Step 1: Understanding the Assertion (A)
The assertion states that "Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted products."

- **Acylation of Amines**: When an amine reacts with an acyl chloride or an acid anhydride, it forms a substituted amide. For example, when ethylamine reacts with acetic anhydride, it forms N-ethylacetamide. This reaction typically leads to only one substitution because the product (amide) does not have a hydrogen atom that can be replaced further by another acyl group.

- **Alkylation of Amines**: In contrast, when an amine reacts with an alkyl halide, it can undergo multiple substitutions. A primary amine can first form a secondary amine, then a tertiary amine, and finally a quaternary ammonium salt. This results in polysubstituted products.
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