<prompt> With which of the following receptors theophylline has an antagonist interaction?Histamine receptorBradykinin receptorAdenoside receptorInidazoline receptor  <response>: theophylline is an eg of methylxanthine the action of this identified as a release of ca from sarcoplasmic reticulum b inhibition of phosphodiesterase cblockade of adenosine receptor ESSENTIALS OF MEDICAL PHARMACOLOGY SEVENTH EDITION KD TRIPATHI PG NO.226 