Post of form append generated via jquery

Gero fields via jquery, with a question and 2 answers, I need to collect these fields in post via php.

Gero as follows:

var length = wrapper.find(".fields").length;

 $(wrapper).append('<div class="col-sm-12 fields fields'+ (length+1) +'">\

    <label >Pergunta</label>\
    <input type="text" value="" name="pergunta'+ (length+1) +'[]">\

    <label >resposta 1</label>\
    <input type="text" value="" name="resposta1'+ (length+1) +'[]">\

    <label >resposta 2</label>\
    <input type="text" value="" name="resposta2'+ (length+1) +'[]">\

    <input type="text"  value="" name="item[]">\
');

The problem in question is that in the foreach post I need to collect the answers to each question.

$size = sizeof($_POST['item']);
for ($i = 0;$i < $size;$i++)
{
    echo 'pergunta:' .$_POST["pergunta1"].'<br>';
}

In this way I know there is no way to directly set the name of the input, because it is dynamic.