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Store multiple radio button values in an array Javascript

I would like to store my test answers in an array in javascript. I created 50 questions with for loop, the user can choose between 4 radio buttons(answer). How could i store these answers in an array?

MY QUESTION CARDS

<% for(var i = 0; i < test.questions.length; i++){%>
  <br>
    <div class="card">
      <div class="card-header">
        <%= test.questions[i].question%></h5>
      </div>
      <ul class="list-group list-group-flush" style="padding: 10px;">
          <li class="list-group-item"><input type="radio" name="one+<%=i%>" value="a"> <%= test.answers[0].answer%></li>
          <li class="list-group-item"><input type="radio"  name="one+<%=i%>" value="b"> <%= test.answers[1].answer%></li>
          <li class="list-group-item"> <input type="radio" name="one+<%=i%>" value="c"> <%= test.answers[2].answer%></li>
          <li class="list-group-item"><input type="radio" name="one+<%=i%>" value="d"> <%= test.answers[3].answer%></li>
          <li class="list-group-item"><input type="radio" name="one+<%=i%>" value="e"> <%= test.answers[4].answer%></li>
      </ul>
    </div>
  </div>
<%}%>

WHAT I TRIED:

<script>
  var arr = []
  document.getElementById("confirm").addEventListener("click", function() {
      for (let index = 0; index < 51; index++) {
      
      var buttonName = "one" + index
     
      var buttChecked = document.querySelector('[name=buttonName]:checked')
      
      if (buttChecked != null) {
        arr.push(buttChecked.value)
      }
      console.log(arr)
    }
  })

</script>

Answer

Just use loop over an array containing the names of the radio button groups and get the value of the selected button in that group and add to the array:

// Store the names of the radio button sets
let names = ["one","two","three"]
let results = [];

document.querySelector("button").addEventListener("click", function(event){
  results = names.map(function(el){
    return document.querySelector("input[name='" + el + "']:checked").value;
  });
  
  console.log(results);
});
<div class="question">
 <input type="radio" name="one" value="Choice A">Something |
 <input type="radio" name="one" value="Choice B">Something |
 <input type="radio" name="one" value="Choice C">Something
</div>

<div class="question">
 <input type="radio" name="two" value="Choice A">Something |
 <input type="radio" name="two" value="Choice B">Something |
 <input type="radio" name="two" value="Choice C">Something 
</div>

<div class="question">
 <input type="radio" name="three" value="Choice A">Something |
 <input type="radio" name="three" value="Choice B">Something |
 <input type="radio" name="three" value="Choice C">Something
</div>
<br>
<button>Collect Answers</button>