<prompt> Which laxative acts by opening of Chloride channels ?DocusateAnthraquinoneLubiprostoneBisacodyl  <response>: Ans. is c i.e., Lubiprostone o Lubiprostone is used for chronic constipation, it acts by - o Stimulating Cl- channel opening in the intestine. Increasing liquid secretion in gut. Decreasing transit time. 