Correct Answer: irritible

Solution : The correct choice is the first option .

The incorrectly spelt word is "irritible", which contains the wrong vowel "i" in place of "a". Irritable is used to describe someone who gets easily annoyed or tends to become agitated or impatient with little reason.

Other words are correctly spelt and their meanings are as follows:

• A gallery is a room that is used for showing works of art.
• Enmity refers to mutual hatred between individuals.
• Earnest is used to describe someone who is sincere and devoted to his work.