Correct Option: B

hidden (Adjective) : that cannot be seen ; secret ; concealed
apparent (Adjective) : easy to see or understand ; obvious ; that seems to be real or true but may not be ; seeming
illegible (Adjective) : difficult or impossible to read
mysterious (Adjective) : difficult to understand or explain ; strange; enigmatic
remote (Adjective) : isolated ; distant ; aloof ; far away from places where other people live