The order of decreasting rate of reaction with ammonia is

Options

A. Anhydrides, esters, ethers
B. Anhydrides, ethers, esters
C. Ethers, anhydrides, esters
D. Esters, ethers, anhydrides

Explanation

To determine the order of decreasing rate of reaction with ammonia among anhydrides, esters, and ethers, we need to analyze the electrophilicity of the carbonyl carbon in each functional group. The more electrophilic the carbonyl carbon, the faster the reaction with ammonia will occur, as ammonia acts as a nucleophile.

### Step-by-Step Solution:

1. **Identify the Functional Groups**:
- We have three functional groups to consider: anhydrides, esters, and ethers.
- Anhydride: R-C(=O)-O-C(=O)-R
- Ester: R-C(=O)-O-R'
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