It is hard to tell
The command module for Apollo 13 was called Aquarius. The lunar module was called Aquarius.
The Apollo 13 Command Module was 'Odyssey' . Aquarius was the Lunar lander.
The Apollo spacecraft has three modules the Service module, the command module and the lunar module.
The main parts of Apollo 11 were the command module and the lunar module.
The two parts of the Apollo 13 are the command module and the lunar module.
All Apollo missions had a crew size of three, consisting of the Commander (CDR), the Command Module Pilot (CMP) and the Lunar Module Pilot (LMP)
The Command Module was called Columbia ( the lunar module was named Eagle.)
They are the command module and the lunar module.
Columbia
The proper names of the Apollo Program's spacecraft, and as such should be capitalized, are: Apollo Command Module (abbreviated CM) Apollo Service Module (abbreviated SM) Apollo Lunar Module (abbreviated LM) Note that when the CM and SM are joined, they become a single spacecraft known as the Apollo Command/Service Module, or CSM.
They were just not built to do it... too heavy, no legs, etc. Command Modules do not land on the moon. The command module is the main capsule for the Apollo program. The lunar module of Apollo 11 however did land on the moon on the 21st of July 1969.
Service Module, Command Module, Lunar Module.