The correct name for CH4 is Methane.
Methane is the simplest hydrocarbon, consisting of one carbon atom bonded to four hydrogen atoms. It is a colorless, odorless gas at room temperature and pressure, and serves as a significant component of natural gas. The other options, carbon tetrahydrogen and carbonic hydrogen, are not commonly used terms in chemistry. Carbon tetrahydrogen does not accurately describe the structure, and carbonic hydrogen is misleading as it suggests properties associated with carbon dioxide. Therefore, methane is the most appropriate and widely recognized name for this compound.