How to differentiate the names of each group of radio buttons?

I'm using the formvalidation.io plugin to do the validation. By default, it does the validation by the name of the radio buttons. But I can not do it that way. I need to know some way / logic to differentiate each name from each group of radio buttons.

Can anyone help me?

EXAMPLE:

<div>
    <div id="perguntas">
        <label>1 - Pergunta 1</label>
        <input type="hidden" name="pergunta[]" value="$pergunta->id" />
        <div id="respostas">
            <input type="radio" name="resposta[$pergunta->id]" value="1" /> Male
            <input type="radio" name="resposta[$pergunta->id]" value="2" /> Female
            <input type="radio" name="resposta[$pergunta->id]" value="3" /> Other
        </div>
        <div>
            <textarea name="mensagem[$pergunta->id]" rows="3" />
        </div>
    </div>
    <div id="perguntas">
        <label>2 - Pergunta 2</label>
        <input type="hidden" name="pergunta[]" value="$pergunta->id" />
        <div id="respostas">
            <input type="radio" name="resposta[$pergunta->id]" value="1" /> Male
            <input type="radio" name="resposta[$pergunta->id]" value="2" /> Female
            <input type="radio" name="resposta[$pergunta->id]" value="3" /> Other
        </div>
        <div>
            <textarea name="mensagem[$pergunta->id]" rows="3" />
        </div>
    </div>

    <div id="perguntas">
        <label>3 - Pergunta ...</label>
        <input type="hidden" name="pergunta[]" value="$pergunta->id" />
        <div id="respostas">
            <input type="radio" name="resposta[$pergunta->id]" value="1" /> Male
            <input type="radio" name="resposta[$pergunta->id]" value="2" /> Female
            <input type="radio" name="resposta[$pergunta->id]" value="3" /> Other
        </div>
        <div>
            <textarea name="mensagem[$pergunta->id]" rows="3" />
        </div>
    </div>

    <div id="perguntas">
        <label>16 - Pergunta 16</label>
        <input type="hidden" name="pergunta[]" value="$pergunta->id" />
        <div id="respostas">
            <input type="radio" name="resposta[$pergunta->id]" value="1" /> Male
            <input type="radio" name="resposta[$pergunta->id]" value="2" /> Female
            <input type="radio" name="resposta[$pergunta->id]" value="3" /> Other
        </div>
        <div>
            <textarea name="mensagem[$pergunta->id]" rows="3" />
        </div>
    </div>  
</div>