Final answer:
Option c) CH3CHO and CH3COCH3 are constitutional isomers of each other.
Step-by-step explanation:
Constitutional isomers are compounds with the same molecular formula but different structural formulas. Let's go through each option:
a) C6H12 and C4H10: The number of carbon atoms in these compounds is different, so they cannot be constitutional isomers.
b) C2H6 and C3H8: These compounds have the same number of carbon atoms but different hydrogen atoms. So, they cannot be constitutional isomers.
c) CH3CHO and CH3COCH3: These compounds have the same number of carbon atoms but different arrangement of atoms. Therefore, they are constitutional isomers of each other.
d) C4H10 and C5H12: These compounds have different molecular formulas, so they cannot be constitutional isomers.
Therefore, option c) CH3CHO and CH3COCH3 are constitutional isomers of each other.