title: Unable to Check Radio-button on (click) of another Radio Button: Angular Reactive Form
body: <p>i wan to change the radio button checked status when user clicks on a radio button in another group.</p>
  
  <p>i am trying to do it on click event, when user clicks on one Radio-button.
  i am checking for the value and changing the radio-button value in another group.</p>
  
  <p>i have added stackblitz <a href="https://stackblitz.com/edit/angular-g1rpoa" rel="nofollow noreferrer">problem-statement</a> link for the same. please let me know what am i doing wrong here.</p>
  
  <p>But i am unable to achieve this</p>
  
  <p>please help.</p>