Which structural isomerism is exhinited by the following pairs :
(i) `CH_(3)-(C)-OH` and `(C)-O-CH_(3)`H- (ii) `CH_(2) =CHOH` and `CH_(3)-overset(O)overset("||")(C)-H`
(iii) `CH_(3)-CH_(2)-CH=CH_(2)` and `CH_(3)-CH=CH-CH_(3)`
(iv) `CH_(3)-CH_(2)-CH_(2)-NH_(2)` and `CH_(3)-underset(NH_(2))underset("|")(CH)-CH_(3)`

Explanation

To determine the type of structural isomerism exhibited by the given pairs of compounds, we will analyze each pair one by one.

### (i) `CH3-C-OH` and `C-O-CH3`
1. **Identify the Functional Groups**:
- The first compound (`CH3-C-OH`) contains an alcohol functional group (-OH).
- The second compound (`C-O-CH3`) contains an ether functional group (R-O-R').
2. **Compare Molecular Formulas**:
- Both compounds have the same molecular formula (C2H6O).
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