Need ! plzz
which describes the relationship between cells and living things? (a) all living things are made of single cells. (b) all living things are made of identical cells.(c)only one type of cell exists to make all living things. (d) cells are the basic unit of structure and function.
(science)

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?