The sets of compound that show the Law of Multiple Proportions are CH4, C2H6, C3H8.
Step-by-step explanation:
Law of multiple proportion: It states that when two elements can combine to form two or more different compounds then the mass of one element compared to fixed mass of the other will always be in a ratio of small whole numbers.
The most appropriate option which depicts it is CH4, C2H6, C3H8. They
comprise of two elements and the ratio of their masses is in small
whole numbers