title: How to select the paragraph with only specific class
body: <p>Let say I have my HTML code look like this:</p>
  
  <pre><code>&lt;p class="p"&gt;Paragraph&lt;/p&gt;
  &lt;p class="p p2"&gt;Paragraph 2&lt;/p&gt;
  &lt;p class="p p3"&gt;Paragraph 3&lt;/p&gt;
  </code></pre>
  
  <p>If I use: <code>$('.p').css('color','red')</code>, this will apply red color to all paragraphs. </p>
  
  <p>How can I apply the style to paragraph that only has class <code>p</code> which is first paragraph in this case?</p>