Identify the incorrect statement.

• A
  Early diagnosis is not possible using conventional methods of diagnosis.
• B
  In $ELISA$,the infection of a pathogen is checked only by the presence of antigens.
• C
  $GEAC$ makes decisions regarding the validity of research involving genetically modified organisms.
• D
  An American company got patent rights on Basmati rice through the $US$ Patent and Trademark Office.