It is not for lay readers to evaluate a great poet.

Answer: Option B

Learned : (of a person) having acquired much knowledge through study.
Ordinary : with no special or distinctive features; normal.
Idle : (of a person) avoiding work; lazy.
Expert : a person who is very knowledgeable about or skilful in a particular area.
Lay : not having professional qualifications or expert knowledge, especially in law or medicine.

Synonym of Lay is Ordinary