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: Anatomy
[{'content': 'Mucous secreting glands are absent in : \nSelect and explain. \nA. Cervix, B. Vagina, C. Duodenum, D. Oesophagus', 'role': 'user'}, {'content': "Answer: B \nExplanation: B i.e. Vagina - No glands open into vagina & vaginal secretions are derived paly from the mucous discharge of cervix & paly from a transudation through the vaginal epithelium.- Doderlein bacilli (gram +ve) are found in vagina- Vaginal mucosa is line by squamous epithelium - Posterior vaginal wall is longer than anterior - Cytology for evidence of corpus luteal activity (ovulation test) is taken from upper lateral vaginal wall DuodenumJejunumIleumSubmucosal Bruner's glandBrunner's gland & Peyer's patchPeyer's patch (aggregated lymph nodules)present absent present", 'role': 'assistant'}]