Send (Pass) selected RadioButton to Controller using AngularJS in ASP.Net MVC

For saving Respective Question Id, Name and it's answer

I am using below function in scripting

            $scope.Save = function () {
            var entry = {};
            var details = new Array();
            var options = document.getElementsByName('gender');
            var option_value;            
            for (var i = 0; i < $scope.questionSet.length; i++) {         
                for (var j = 0; j < $scope.questionSet[i].Questionoptions.length; j++)
                     {
                    for (var k = 0; k < options.length; k++) {
                        if (options[k].checked) {
                            if (options[k].value == $scope.questionSet[i].Questionoptions[j].Options) {
                                var question = {};
                                question.QId = $scope.questionSet[i].Questions.QId;
                                question.QName = $scope.questionSet[i].Questions.QName;
                                option_value = options[k].value;
                                question.Answer = option_value
                                document.getElementById('selected').innerHTML += "<br>" + option_value;
                                details.push(question);
                            }
                        }
                        }
                }
            }
            entry.details = details;
            $http({
                method: "Post",
                url: "/home/Save",
                dataType: 'json',
                headers: { "Content-Type": "application/json" },
                data: '{data: ' + JSON.stringify(entry) + '}'
            }).then(function (result) {
            })
        }