The given problem asks to select a word similar in meaning to "Plausible".
To find the correct synonym, we begin by understanding the meaning of "Plausible". The word "Plausible" is used to describe something that appears to be reasonable or probable. It suggests something can be believed or accepted as true.
Let's analyze the options:
From the analysis, "Believable" matches the meaning of "Plausible" as both suggest the ability to be trusted or accepted as true.
Therefore, the correct answer is: Believable.