This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'Commonest route of spread of Tuberculosis to genital tract is: \nSelect and explain. \nA. Lymphatic spread, B. Hematogenous spread, C. Direct spread, D. Sexually transmitted', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • Genital TB is almost always secondary to focus elsewhere.\n• Primary focus is in lungs (50%), lymph nodes (40%) cases.\n• Hematogenous spread is the commonest mode followed by direct spread and ascending route.\n• Only about 10 percent of genital TB cases have children.\n• “Salpingitis isthimica nodosa” is nodular thickening of tubes in genital TB.\n• Endometrium of uterus is involved in 60 percent cases.\n• Cervix is involved in 10 to 15% of cases.', 'role': 'assistant'}]