Correct Option: B

ordinary (Adjective) : not unusual or different in anyway; having no unusual or interesting features
mundane (Adjective) : not interesting or exciting; dull; ordinary
musical (Adjective) : connected with music; containing music; with a natural skill or interest in music; pleasant to listen to
mortal (Adjective) : that cannot live for ever and must die; causing death or likely to cause death; very serious; lasting until death;
deadly mandatory (Adjective) : required by law; compulsory