Part A The relationship between a gene and a messenger RNA is as follows:
O mRNAs make a copy of genes.
O mRNAs make proteins which then code for genes.
O mRNA is directly responsible for making a double-stranded replicate of the gene.
O Genes are made from mRNAs.
O All genes are made from mRNAs.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

thats not even an aswer choice

it depends on how much it could carry.