Jquery Accessing grouped buttons with all similar attributes in a list

Jquery Accessing grouped buttons with all similar attributes in a list

Was seeking help i am unable to access elements in grouped buttons without affecting next element with all similar attributes Example

 
<div class="btn-group">
   <button type="button" class="btn btn-primary"> Apple </button>
   <button type="button" class="btn btn-primary"> Samsung </button>
   <button type="button" class="btn btn-primary"> Sony </button>
</div>
< div  class="btn-group" >
   <button type="button" class="btn btn-primary"> Apple </button>
   <button type="button" class="btn btn-primary"> Samsung </button>
   <button type="button" class="btn btn-primary"> Sony </button>
</div>

NB:its a list generated dynamically and would like to access individual elements with jquery and toggle the buttons