Respuesta :
Answer : Option A) [tex] NH_{4}^{+} and NH_{3} [/tex]
Explanation : [tex] NH_{4}^{+} and NH_{3} [/tex] are considered as an acid-conjugate base pair, because[tex] NH_{4}^{+}[/tex] is an acid with a proton extra in its compound which makes it more acidic and rich in proton, while [tex] NH_{3} [/tex] is found to be the conjugate base of [tex] NH_{4}^{+} [/tex] as it does not contains the [tex]H^{+}[/tex] ions.
[tex] NH_{4}^{+} and H_{3}O^{+} [/tex] both are acids, and the last option where both [tex] H_{2}O and NH_{3} [/tex] can be considered as bases.
The reaction which is an acid-conjugate base pair is NH4+. This is the conjugate acid of NH3
What is an acid-conjugate base pair?
An acid-conjugate base pair is a pair of substances that would have been similar in chemical composition but for the presence of one proton (H+).
To form a conjugate Acid, one proton must be added to a base. To create a conjugate Base on the other hand, one proton must be removed from an acid.
See the link below for more about acid-conjugate base pairs:
https://brainly.com/question/22514615