How to show disable HTML select option in by default?

use

<option selected="true" disabled="disabled">Choose Tagging</option>

Use hidden.

<select>
   <option hidden>Choose</option>
   <option>Item 1</option>
   <option>Item 2</option>
</select>

This doesn't unset it but you can however hide it in the options while it's displayed by default.

In HTML5, to select a disabled option:

<option selected disabled>Choose Tagging</option>

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