QWhat will be the output of following JS program?

function getcube()
{  
    var number=document.getElementById("number").value;  
    alert(number*number*number);  
}
<form>  
     Enter No:<input type="text" id="number" value="3" name="number"/><br/>  
     <input type="button"  value="ok" onclick="getcube()"/>  
</form>

Choose the Best Option

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• B 27 ✔ ✖
• C 9 ✔ ✖
• D undefined ✔ ✖

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