Apologies if my question was unclear, Im still new to this field. However, I’ve found a solution based on a comment by "aurelian-scarlat" in the GitHub issue:
https://github.com/Meteor-Community-Packages/meteor-autoform-select2/issues/44
I cannot use the class name ".select2normalWithouClear" because there are some other elements with the same class. So what i did was give the new class name same for all my select and initialized them like this:
<select class="form-control select2normalWithouClear edu-level mySelectDropdown" data-placeholder="Select Education Level"><option>Test 1</option><option>Test 2</option><option>Test 3</option></select>
<select class="form-control select2normalWithouClear edu-instituteName mySelectDropdown" data-placeholder="Select Institution Name"><option>Test 1</option><option>Test 2</option><option>Test 3</option></select>Initilize it:
$('.mySelectDropdown').select2({ placeholder: $(this).data('placeholder') });