Answer:
Hydrogen and Hydrogen is the correct option
Step-by-step explanation:
A covalent bond, is a chemical bond that involves the sharing of electron pairs between atoms so that each participating atom attain octec or duplet configuration. For many molecules, the sharing of electrons allows each atom to attain the equivalent of a full outer shell, corresponding to a stable electronic configuration.
Covalent bonding between hydrogen atoms is possible Since each hydrogen atom has one electron, they are able to fill their outermost shells or attain duplet configuration by sharing a pair of electrons through a covalent bond.