In the context of acid-base chemistry, what is the relationship between a conjugate acid and its conjugate base?
A. A conjugate acid is formed by the addition of a proton to a conjugate base.
B. A conjugate base is formed by the addition of a proton to a conjugate acid.
C. A conjugate acid and its conjugate base are the same chemical species in different states.
D. A conjugate base is formed by the addition of an electron to the conjugate acid.