Multiple choice general knowledge

Which is correct..?

  1. He is making a big mistake.

  2. He is making a great mistake.

  3. a&b

  4. none

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The standard idiomatic expression is 'a big mistake'. While 'great' can mean large in some contexts, in the fixed expression 'make a mistake', we use 'big' as the modifier. 'A great mistake' is not standard English usage in this context.