In my case solution is really silly, and strange.
Below code was pre-populated by _Layout.cshtml file. (NOT written by me)
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/bootstrap.min.js"></script>
But, when I verified in Scripts folder, jquery-1.10.2.min.js was not even available. Hence, replaced code like below where jquery-1.9.1.min.js is an existing file:
<script src="~/Scripts/jquery-1.9.1.min.js"></script>
<script src="~/Scripts/bootstrap.min.js"></script>