"$A$ given compound always contains the same proportion of elements" is a statement of $-$

Which one of the following sets of compounds correctly illustrates the law of reciprocal proportions?

Hydrogen peroxide and water contain $5.93\%$ and $11.2\%$ of hydrogen,respectively. Which law is illustrated by this data?

"Mass can neither be created nor destroyed" is the statement of

The statement related to the law of definite proportions is:

In compound $A$,$1.00 \, g$ nitrogen unites with $0.57 \, g$ oxygen. In compound $B$,$2.00 \, g$ nitrogen combines with $2.24 \, g$ oxygen. In compound $C$,$3.00 \, g$ nitrogen combines with $5.11 \, g$ oxygen. These results obey the following law: