Correct Option: B

amateur (Noun) : a person who takes part in a sport or other activity for enjoyment, not as a job
professional (Adjective) : connected with a job that needs special training or skill; competent; well-trained and extremely skilled
novice (Noun) : a person who is new and has little experience in a skill, job or situation
dabbler (Noun) : an amateur who engages in an activity without serious intentions and who pretends to have knowledge
apprentice (Noun) : a young person who works for an employer for a fixed period of time in order to learn the particular skills needed in his job