How to select & change color button for different button group?

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Javascript

CSS

HTML5

bootstrap

I am creating two button groups. whenever I click a button from second button group, already selected button from 1st group is getting deselected. I am able to select only one button both group. I want to select one button from each group. This is the code & I use :focus (css) for button. I need to use button type for bootsrap (btn-primary).This is my HTML code & CSS please help me.

<div class="row">
  <div class="column" style="width:30%">
    <div class="btn-group" >
      <button type="button" class="btn btn-primary" style="outline-color:red; " @onclick="() => UpdateTheChart(11)">@Language.T35</button>
      <button type="button" class="btn btn-primary" @onclick="() => UpdateTheChart(12)">@Language.T36</button>
      <button type="button" class="btn btn-primary" btn btn-primary" @onclick="() => UpdateTheChart(13)">@Language.T37</button>
    </div>
  </div>
  <div class="column" style="width:70%">
    <div class="btn-group" >
      <button type="button" class="btn btn-primary" @onclick="() => UpdateTheChart(21)">@Language.T138</button>
      <button type="button" class="btn btn-primary"@onclick="() => UpdateTheChart(22)">@Language.T38</button>
      <button type="button" class="btn btn-primary" @onclick="() => UpdateTheChart(23)">@Language.T39</button>
      <button type="button" class="btn btn-primary" @onclick="() => UpdateTheChart(24)">@Language.T40</button>
    </div>
  </div>
</div>

.show {
  display          : block;
  }
.btn-group {
  margin-top       : 20px;
  overflow         : hidden;
  }
.btn {
  font-weight      : bold;
  color            : white;
  border           : none;
  outline          : none;
  padding          : 12px 16px;
  /*blue*/
  background-color : #2c75ff;
  cursor           : pointer;
  }
.btn:hover {
  font-weight      : bold;
  color            : white;
  /*green*/
  background-color : #85c995;
  }
.btn:focus {
  /*green*/
  background-color : #85c995;
  color            : white;
  }

What I have tried:

I have tried the label radio & Javascript doesnt work.