If I have this DOM:
<div class="A others classes">
    other elements
    <div class="AB other classes"></div>
    other elements
</div>
I want to select the div with class A.
I have tried with //div[contains(@class, 'A')], but also select the div with class AB.
How I can select just div with class A? I can't use other classes in xpath, because are dynamic added to element.