Identify the correct statement with reference to human digestive system.
A
Serosa is made up of thin endothelium without connective tissues
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B
Mucosa forms crypts of Lieberkuhn in between the bases of villi in small intestine
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C
Caecum and vermiform appendix participate in digestion of cellulose
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D
Back flow of the faecal matter from ileum into caecum is prevented by ileo-caecal valve
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Solution
The correct option is B Mucosa forms crypts of Lieberkuhn in between the bases of villi in small intestine Serosa is the outermost layer of alimentary canal formed by mesothelium and some connective tissue. Caecum and vermiform appendix do not participate in digestion of cellulose in humans.