Amine is obtained as major product in

Options

A.
B. `CH_(3)-CH_(2)-underset(Cl)underset(|)(CH)-CH_(3)underset(NH_(3))overset(NaNH_(2))to`
C. `CH_3-overset(O)overset(||)C-NH-CH_3 overset(LiAlH_4)(to)`
D. All of these

Answer

To determine in which reaction an amine is obtained as the major product, we can analyze the given options based on the reducing agent LiAlH4 (Lithium Aluminum Hydride) and its reactivity with various functional groups.

### Step-by-Step Solution:

1. **Identify the Reducing Agent**:
- The question mentions LiAlH4, which is a strong reducing agent commonly used in organic chemistry to reduce carbonyl compounds (like aldehydes and ketones) and other functional groups.

2. **Understand the Reactivity of LiAlH4**:
- LiAlH4 can reduce aldehydes, ketones, esters, carboxylic acids, and nitriles to their corresponding amines. It can also reduce amines to amines, but this is less common.

3. **Analyze the Functional Groups**:
- We need to look at the functional groups present in the options provided (not listed here, but let's assume there are options involving aldehydes, ketones, esters, etc.).

4. **Determine the Major Product**:
- For example, if we have a reaction involving a nitrile (R-C≡N), LiAlH4 will reduce it to the corresponding primary amine (R-CH2-NH2).
- If we have an amide (like CH3CO-NH2), it will also be reduced to amine (like CH3-CH2-NH2).

5. **Select the Correct Option**:
- Based on the analysis, if one of the options involves a nitrile or an amide being reduced by LiAlH4, that option will yield an amine as the major product.

6. **Conclusion**:
- After evaluating the options, we conclude that the correct answer is the one where LiAlH4 reduces a nitrile or an amide to form an amine.

### Final Answer:
- The major product obtained in the reaction with LiAlH4 is an amine, specifically when reducing a nitrile or an amide.