`CH_(3)-CH=CH-underset(O)underset(||)(C)-CH_(3)+NH_(2)-OHoverset(H^(o+))(to)` major product is

Options

A. `CH_(3)-underset(NH_(2))underset(|)(CH)-underset(OH)underset(|)(CH)-underset(O)underset(||)(C)-CH_(3)`
B. `CH_(3)-underset(OH)underset(|)(CH)-underset(NH_(2))underset(|)(CH)-underset(O)underset(||)(C)-CH_(3)`
C. `CH_(3)-CH=CH-underset(CH_(3))underset(|)(C)=N-OH`
D. `CH_(2)-underset(OH)underset(|)(CH)-CH_(2)-underset(O)underset(||)(C)-CH_(3)`

Answer

To solve the given question, we need to determine the major product formed when hydroxylamine (NH2OH) reacts with the provided ketone. The ketone structure is CH3-CH=CH(C=O)-CH3.

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants are a ketone (CH3-CH=CH(C=O)-CH3) and hydroxylamine (NH2OH).

2. **Understand the Reaction Type**:
The reaction between a ketone and hydroxylamine is an addition reaction, where the carbonyl group (C=O) of the ketone reacts with hydroxylamine.

3. **Draw the Structure of the Ketone**:
The ketone can be represented as follows:
```
CH3
|
CH3-CH=CH-C=O
```

4. **Add Hydroxylamine to the Ketone**:
Hydroxylamine will attack the carbonyl carbon (C=O) of the ketone. The nitrogen from hydroxylamine will form a bond with the carbonyl carbon, and the oxygen will take a hydrogen from the nitrogen, leading to the formation of a double bond between carbon and nitrogen.

5. **Form the Intermediate Product**:
The reaction will produce an intermediate compound where the carbonyl oxygen is replaced by the nitrogen from hydroxylamine:
```
CH3
|
CH3-CH=CH-C=N-OH
```

6. **Elimination of Water**:
During the reaction, a water molecule (H2O) is eliminated. The hydroxyl group (OH) from hydroxylamine and a hydrogen from the carbonyl carbon combine to form water.

7. **Final Product Structure**:
The final product will be a double bond between the carbon and nitrogen, resulting in:
```
CH3
|
CH3-CH=CH-C=N-OH
```

8. **Identify the Major Product**:
The major product formed from this reaction is the oxime of the ketone, which is represented as:
```
CH3
|
CH3-CH=CH-C=N-OH
```

9. **Conclusion**:
The major product of the reaction between the given ketone and hydroxylamine is the corresponding oxime, which matches with option number C.

### Final Answer:
The major product is **option C**.