<prompt> Which of the following statement is not true regarding dobutamineAgonist of D1 and D2 receptorsDerivative of dopamineSelective beta-agonistic actionReduced chances of arrhythmia than adrenaline  <response>: Dobutamine is a derivative of D.A but not a D1 or D2 receptor agonist. It is a selective beta 1 agonist. It so less arrhythmogenic than adrenaline. From essential of medical pharmacology K D Tripati 7th edition Page no 134 