How to change color of one element by clicking on another - jquery -

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i've got multiple choice test on english/thai language web site. each row has question , 4 answer choices, layout 50x5 matrix. 

    <div id="question">         <p class="word_test">1<span class="1 color_up audio" id="b1e01">the </span></p>         ...         <p class="word_test">50<span class="50 color_up audio" id="b1e50">if </span></p>     </div>     <div id="answers">         <div id="col_a">             <p class="word_test">a:<span class="1 color_up audio" id="b1t01">คำนำหน้านาม</span></p>                 ...             <p class="word_test">a:<span class="50 color_up incorrect">มัน </span></p>         </div>         <div id="col_b">           ...          </div>         <div id="col_c">           ...         </div>         <div id="col_d">             <p class="word_test">d:<span class="1 color_up incorrect">เลอะ </span></p>                 ...             <p class="word_test">d:<span class="50 color_up incorrect">เป็น อยู่ คือ </span>    </p>         </div>     </div>

when user clicks on 1 of a,b,c or d choices, want question item in row change green (correct) or red (incorrect). problem how in 1 row link clicked target (a,b,c or d) requicolor change. can see addclass , removeclass handle color change can't see how make connection between clicked on answer , question items. i've numbered rows in each column corresponding question can referenced don't know if necessay. help.

see .click()

$("#other").click(function() {   $("#target").css("background", "red"); });

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