observe the table given below carefully.

Name	Molecular formula	Name	Molecular formula
Methane	${\mathrm{CH}}_4$	Heptane	${\mathrm{C}}_7{\mathrm{H}}_{16}$
Ethane	${\mathrm{C}}_2{\mathrm{H}}_6$	Octane	${\mathrm{C}}_8{\mathrm{H}}_{18}$
Propane	${\mathrm{C}}_3{\mathrm{H}}_8$	Nonane	B
Butane	${\mathrm{C}}_4{\mathrm{H}}_{10}$	Decane	${\mathrm{C}}_{10}{\mathrm{H}}_{22}$
A	${\mathrm{C}}_5{\mathrm{H}}_{12}$	C	${\mathrm{C}}_{20}{\mathrm{H}}_{42}$
Hexane	${\mathrm{C}}_6{\mathrm{H}}_{14}$	D	${\mathrm{C}}_{30}{\mathrm{H}}_{62}$

complete the above table by selecting proper alternatives in place of A, B, C and D respectively.

Codes