Correct option is A
Option (a)
familiar is correctly spelt.
· Meaning: Well-known or easily recognized (परिचित, जाना-पहचाना)
Example: His voice sounded familiar to me.
Why other options are incorrect:
· (b) usualy – Should be “usually”
· (c) nuicense – Correct spelling is “nuisance”
· (d) privelege – Correct spelling is “privilege”