Choose the correct statement about the role of opioid antimotility drugs in the management of diarrhoeas (a) They are used to control diarrhoea irrespective of its etiology (b) They should be used only as a short-term measure after ensuring that enteroinvasive organisms are not involved (c) They are used as adjuvants to antimicrobial therapy of diarrhoea (d) They are the drugs of choice in irritable bowel syndrome diarrhoea