Question

nh₄⁺ hydroxide silicon ammonium sodium

Explanation:

The ion given is $\ce{NH4+}$, which is the ammonium ion. We need to match it with the correct name. Hydroxide is $\ce{OH-}$, silicon is an element (Si), sodium is $\ce{Na+}$, and ammonium is $\ce{NH4+}$. So the correct match is ammonium.

Answer:

ammonium (the option with "ammonium" text, likely the green - colored option in the image)