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: Social & Preventive Medicine
[{'content': 'Dietary fibres include \nSelect and explain. \nA. pectin, B. lignin, C. cellulose, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Dietary fibre \n\nDietary' fibre consists of unabsorbable cell w-all and other constutents of vegetable food like cellulose, lignin, hemicellulose, gums, pecns, glycoproteins and other polysaccharides.\nDietary' fibre absorbs water in the intesne, swells, increase bulk of stood by increasing water content of faeces and soen it,\xa0decreases transit me by facilitang colonic transit. “Thepresence of fibre shortens the transit mes and increases the stool bulk”\nDietary' fibre is of two types:\n\n\nSoluble fibres: It absorbs upto 15 mes its weight in water as it moves through GIT, producing soer stools.\xa0Its good sources are oat, flaxseeds, peas, beans, apple, citrus fruits, carrots, barley and psyllium.\nInsoluble fibre:\xa0It promotes movement of material through digesve system and increases stool bulk. Its good sources are wheat flour, wheat bran, nuts and vegetables.\n\nAdvantages of fibres \n\nDietry fibre contribute bulk by absorbing water 1-15 mes of its own weight and thus hastens the passage through the gut, decreasing the transient me.\nBy increasing the bulk, it provides a larger volume of indigesble material to colon.\nDietary fibre is known to be associated with reduced incidence of coronary artery diseases.\xa0The mechanism of its acon is aributed to its binding to bile salts and prevenng its absorpon and thus reducing cholesterol (LDL cholesterol) level in circulaon.\nThe fibre, parcularly the gum and pecn, when ingested with a diet, are reported to reduce postprandial glucose level in blood → helpful in DM.\nDietary fibre reduce the incidence of diverculis, conspaon, hemorrhoids, irritable bowel syndrome and colon cance", 'role': 'assistant'}]