<prompt> The intense craving experienced by the people recovering from chronic alcoholism can be treated by a drug which acts by being an:Agonist of serotonin receptorsAgonist of alpha adrenoceptorsAgonist of beta adrenoceptorsAntagonist of opioid receptors  <response>: Ref: KDT 6e p467 Naltrexone is used to decrease the craving for alcohol after de-addiction. 