Which of the following is correct for

Options

A. `CH_(3)-COClgtCH_(3)-COOCO-CH_(3)gtCH_(3)-COC_(2)H_(5)gtCH_(3)-CONH_(2)`
(reactivity towards cyanohydrin formation)
B. `C_(6)H_(5)-CH=OgtCH_(3)-CH=OgtCH_(3)-CO-CH_(3)`
(reactivity towards cyanohydrin formation)
C.
(reactivity towards electrophilic substitution reaction)
D. `CH_(3)-CH_(2)-CH_(2)CH_(2)-OHgtH_(3)C-CH_(2)-overset(OH)overset(|)(CH)-CH_(3)gt(CH_(3))_(3)C-OH`
(reactivity towards Lucar reagent)

Answer

To solve the question regarding the correct order of reactivity for the formation of cyanohydrins, we will analyze the reactivity of different carbonyl compounds: acid chlorides, acid anhydrides, esters, and amides.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- The compounds given are:
- Acid Chloride (e.g., CH3C(=O)Cl)
- Acid Anhydride (e.g., CH3C(=O)OC(=O)CH3)
- Ester (e.g., CH3C(=O)OCH2CH3)
- Amide (e.g., CH3C(=O)NH2)

2. **Understand the Mechanism of Cyanohydrin Formation**:
- The formation of cyanohydrins involves the nucleophilic attack of cyanide (CN-) on the electrophilic carbonyl carbon of the carbonyl compounds.
- The more positive the carbonyl carbon, the more reactive it is towards nucleophiles.

3. **Analyze Reactivity Based on the Leaving Group**:
- **Acid Chloride**: Chlorine is a good leaving group and contributes to a high positive charge on the carbonyl carbon, making it the most reactive.
- **Acid Anhydride**: The presence of two carbonyl groups means that the electron-withdrawing effect is significant, but it is less reactive than acid chlorides due to the resonance stabilization of the carbonyls.
- **Ester**: The alkoxy group (O-R) is an electron-donating group, which decreases the positive charge on the carbonyl carbon, making it less reactive than acid anhydrides.
- **Amide**: The amine group (NH2) is a strong electron-donating group through resonance, which significantly reduces the positive charge on the carbonyl carbon, making it the least reactive.

4. **Order of Reactivity**:
- Based on the analysis, the order of reactivity towards cyanohydrin formation is:
- Acid Chloride > Acid Anhydride > Ester > Amide

5. **Conclusion**:
- The correct order of reactivity for the formation of cyanohydrins from the given compounds is:
- **True Statement**: Acid Chloride > Acid Anhydride > Ester > Amide.