The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Latest technique by which bone graft is obtained without damaging vital structure, vessels/veins is based on?   (A) Piezoelectric vibration   (B) Osteotome   (C) Ultrasonic/soft lasers   (D) Electrocautery
['(A) Piezoelectric vibration <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Piezoelectric vibration \n (B) Osteotome \n (C) Ultrasonic/soft lasers \n (D) Electrocautery <> possible answers', '  Latest technique by which bone graft is obtained without\ndamaging vital structure, vessels/veins is based on? <> context@']