A metamer is an isomer having the same molecular formula, the same functional group, but different alkyl/aryl groups on either side of the functional group.
Hence, option (4) is the correct metamer.
Let A be a 3 × 3 matrix such that \(\text{det}(A) = 5\). If \(\text{det}(3 \, \text{adj}(2A)) = 2^{\alpha \cdot 3^{\beta} \cdot 5^{\gamma}}\), then \( (\alpha + \beta + \gamma) \) is equal to: