Question

A false idea about something is a(n)

Answer 1

B. Misconception

Step-by-step explanation:

Misinformation causes misconception, which are things beleived to be true but are not. False information or ideas are misconceptions.

(this question has also been answered before, so this is proven to be correct)

Answer 2

illusion. (n.) a false idea; something that one seems to see or be aware of that really does not exist.