The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Cross-linking in resins helps increasing:   (A) Strength   (B) Hardness   (C) Crazing resistance   (D) All of the above
['(D) All of the above <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Strength \n (B) Hardness \n (C) Crazing resistance \n (D) All of the above <> possible answers', '  Cross-linking in resins helps increasing: <> context@']