The word 'Maverick' refers to -

The word 'Maverick' refers to - A person who thinks and acts independently of and differently from others.

প্রশ্নে উল্লেখিত অন্য অপশন গুলোর মধ্যে - 
Having the habit of talking a lot, especially about unimportant things - Garrulous.
Ordinary and not interesting in any way - Mundane.
Not easily excited or emotional - Phlegmatic.

Source: Lecture