The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Electric resistance between oral mucosa and PDL is always constant that is:   (A) 4.5 K ohm   (B) 5.5 K ohm   (C) 6.5 K ohm   (D) 7.5 K ohm
['(C) 6.5 K ohm <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 4.5 K ohm \n (B) 5.5 K ohm \n (C) 6.5 K ohm \n (D) 7.5 K ohm <> possible answers', '  Electric resistance between oral mucosa and PDL is always constant that is: <> context@']