From the given options choose the one which is the closest in meaning to the word given below 

DOUBT

Disbelief

The word that is closest in meaning to the word doubt is disbelief.

• Doubt means to have uncertainty or lack of conviction about something.
• Disbelief means a lack of belief or trust in something.

Both words refer to a lack of certainty, but doubt is more general, while disbelief implies a more active rejection of something.

The other words in the options do not have the same meaning as doubt.

• Ignorance means a lack of knowledge or information.
• Dullness means a lack of interest or excitement.
• Mistake means an error or a wrong action.