If I understand you right, you just want to select data from your database and use it in your HTML. This is a very basic question. If you don't know how to do this, I would recommend a "How to learn MySQL" book first. You won't have fun developing a website where you have to ask online for every line of code.
Edit: Okay, now there is some code. This should work:
<option value="<?php echo $rc; ?>"><?php echo $row["FIRSTNAME"]</option>
However, please don't use your code in a public website. It's not the topic of the question, but there is a huge SQL-Injection vulnerability in your code.
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