Final answer:
In redox reactions, when hydrogens are transferred, electrons are also transferred with them as the hydrogen atom consists of a proton and an electron. Correct answer is a. Electrons.
Step-by-step explanation:
Whenever hydrogens are transferred in redox reactions, electrons follow with them. This is because hydrogen atoms consist of one proton and one electron; therefore, when a hydrogen atom is transferred, its electron also moves. In the context of redox reactions, the transfer of electrons is what defines oxidation and reduction.
The atom that loses electrons is oxidized, and the atom that gains electrons is reduced. Understanding this electron transfer is crucial in biochemical reactions, such as when NAD+ is reduced to NADH in metabolic processes, illustrating that the transfer of hydrogens is accompanied by the movement of electrons. So, Correct answer is a. Electrons.