how can i find particular li from posted text - php

Question

I have created one script to find the correct answer and incorrect answer on click event of li I am posting data and fetch response if response is correct_ans at that time only one class will add which is correct-answer and if answer is not correct that I want to add 2 class like which answer they clicked on that href I will add incorrect-answer and I will post correct answer like correct answer is 456 and they select 1234 then I have to show incorrect-answer on 1234 href and correct-answer on 456 href
I have added my code given below in that I have to try siblings but it is not working and shows error: Uncaught ReferenceError: sibling is not defined
$(this).find("a").addClass("active");
var answer = $(this).find("p").html();
//console.log(ID);
$.post('functions.php', {
answer: answer
}, function(data) {
//console.log(data);
if (data != 'correct_ans') {
console.log(data);
if ($(".active").siblings("ul").$('li[text="' + data + '"]').length > 0) {
alert('F');
} else {
alert('no F');
}
$(".active").addClass("incorrect-answer");
} else {
console.log(data);
$(".active").addClass("correct-answer");
}
//$(".answer-list").css("pointer-events","none");
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.1/jquery.min.js"></script>
<ul class="answer-list" id="answer_list1">
<li>
<a tabindex="1" id="question1">
<span class="letter-option">A.</span>
<div>
<p>123</p>
</div>
</a>
</li>
<li class="active">
<a tabindex="2" id="question1">
<span class="letter-option">B.</span>
<div>
<p>456</p>
</div>
</a>
</li>
<li>
<a tabindex="3" id="question1">
<span class="letter-option">C.</span>
<div>
<p>789</p>
</div>
</a>
</li>
<li>
<a tabindex="4" id="question1">
<span class="letter-option">D.</span>
<div>
<p>1234</p>
</div>
</a>
</li>
</ul>
<ul>
</ul>
so can anybody help me in this.

Answer 1

I have found an answer
Use this
$("a:contains("+data+")").addClass("correct-answer");