Due to long 250 values in answer list, too hassle to scroll down to select the value.

For example i type in the keyboard for "aku", the dropdown will filter the values with match in the for me to select
"Akui"
"Baku"
"macaku"
"Yaku"
...


Possible to have autocomplete like this?

There is a workaround here (may need modifications for later versions of LimeSurvey) - Use_jQuery_Autocomplete_plugin_to_suggest_answers_for_text_inputs