Radio button isn't working in my view

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ASP.NET5

ASP.NET-Core

C#7.1

Hello , I have quiz Project And I Created a view for the candidate to start the exam , the Questions And Answers Loaded Correctly but when I check Answer for First Question and Select the answer in the Next Question the first question reset , it's like All the question are one Question

here is my HTML CODE

<pre>        <div class="col-12">
            @foreach (var Item in Model)
            {
                <p class="fw-bold">@Item.Question</p>
                @foreach (var Answer in Item.Answers)
                {
                    <div>
                        <input type="radio" name="box" id="@Answer.Id">
                        <label for="@Answer.Id" class="box">
                            <div class="course">
                                
                                 @Answer.Answer 
                            </div>
                        </label>


                    </div>
                }
            }
        </div>

What I have tried:

I tried some solution but it's not working and it's hard to search for this problem in google