The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A patient complains of sensitivity in a Mandibular premolar. A well condensed class V amalgam restoration was placed in that tooth 5 months ago, with no discomfort for the first 4 months. Since then it has become increasingly sensitive. The problem probably relates to:   (A) Marginal leakage   (B) Fractured restoration   (C) Irreversible pulpal damage   (D) Tooth brush abrasion
['(C) Irreversible pulpal damage <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Marginal leakage \n (B) Fractured restoration \n (C) Irreversible pulpal damage \n (D) Tooth brush abrasion <> possible answers', '  A patient complains of sensitivity in a Mandibular premolar. A well condensed class V amalgam restoration was placed in that tooth 5 months ago, with no discomfort for the first 4 months. Since then it has become increasingly sensitive. The problem probably relates to: <> context@']