<div class="container">
        <div class="row">
            <div class="col-12">
                <div class="row">
                    <div class="col-6 one"><input type="radio" name="a" data-id="" data-name=""></div>
                    <div class="col-6 one"><input type="radio" name="a" data-id="" data-name=""></div>
                </div>
            </div>
            <div class="col-12">
                <div class="row">
                    <div class="col-6 tow"><input type="radio" name="b" data-id="" data-name=""></div>
                    <div class="col-6 tow"><input type="radio" name="b" data-id="" data-name=""></div>
                </div>
            </div>
            <div class="col-12">
                <div class="row">
                    <div class="col-6 three"><input type="radio" name="c" data-id="" data-name=""></div>
                    <div class="col-6 three"><input type="radio" name="c" data-id="" data-name=""></div>
                </div>
            </div>
            <div class="col-12">
                <div class="row">
                    <div class="col-6 four"><input type="radio" name="d" data-data-id="" data-name="" data-name=""></div>
                    <div class="col-6 four"><input type="radio" name="d" data-data-id="" data-name="" data-name=""></div>
                </div>
            </div>
            <div class="col-12">
               <button id="Add">Add</button>
            </div>
        </div>
    </div>

  public class Answer
    {
        public int Id { get; set; }
        public string a { get; set; }
        public string b { get; set; }
    }