<prompt> True for Phase IV of clinical trials: March 2012Done for paediatric drugsDone for rare drugsAfter-marketing surveillance of drugsHuman pharmacology and safety  <response>: Ans: C i.e. After-marketing surveillance of drugs Phases of clinical trial Phase IV of clinical trial is post marketing surveillance data collected about the efficacy, acceptability and adverse effects of the drug. Fuher therapeutic trials involving special groups like children, elderly, pregnant lactating women, patients with renalhepatic diseases etc.which are generally excluded from clinical trials may be undeaken at this stage Phase I of clinical trial is human pharmacology and safety 