This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Male Genital Tract, Subject name: Pathology
[{'content': 'Teratozoospermia refers to? \nSelect and explain. \nA. Absence of semen, B. Absence of sperm, C. All dead sperms in ejaculate, D. Morphologically defective sperms', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Morphologically defective spermsRef: Harrison 18thed ch-346, Smith Urology 17thed p.691, style="font-size: 1.04761904761905em; font-family: Times New Roman, Times, serif"> publications/2010Z9789241547789_eng.pdf', 'role': 'assistant'}]