How to position the text next to images properly in PDF?

I'm using PHP, Smarty and TCPDF library to generate the PDF copy of a document. The document contains images of mathematical expressions from WIRIS editor along with the text content.

I'm having a problem positioning the text coming next to the expression image properly.

I tried every thing in CSS float properties, but nothing happened. I'm attaching the screen shot of exactly what I want with this mail.

This is the smarty template code to print the question and its options:

{foreach from=$question_data item=qstn_ans key=key}
    <table border="0" width="100%" cellpadding="2" cellspacing="0">
        <tr>
            <td valign="top" >{if $qstn_ans.question_directions}{$qstn_ans.question_directions}<br /><b>Question {$que_seq_no} : </b>{/if}{$qstn_ans.question_text}</td>
        </tr>
        {if $qstn_ans.question_file}
        <tr>
            <td><img src="{$ques_thum_image_path}{$qstn_ans.question_id}_{$qstn_ans.question_file}" /></td>
        </tr>
        {/if}
        {if $qstn_ans.question_has_sub_ques==0}
            {if $qstn_ans.answer}
                {foreach from=$qstn_ans.answer item=ans key=ans_no}
                    <td valign="top" >
                        {if $ans.answer_is_right==1}{assign var='correct_ans' value=$ans_no+1}{/if}
                            <b>{$ans_no+1}.</b>&nbsp;&nbsp;{if $ans.answer_text!=''}{$ans.answer_text}{/if}
                            {if $ans.answer_file!=''}<img src="{$ans_thumb_img_path}{$ans.answer_id}_{$ans.answer_file}" />{/if}
                     </td>
                </tr>
                {/foreach}
        <tr>
            <td></td>
        </tr>
    </table>
{/foreach}

This code snippet may contain some errors, as I pasted it randomly without checking the loop and brackets completio