Bash - Multiple choice, user input

menuselect.sh

#!/bin/bash
echo "Name? Use, alphabetic letter from multiple choice. 
    a)Donald
    b)Alan 
    c)Brian"

THIS_SELECTION=
until [ "${THIS_SELECTION^}" == "A" ] || [ "${THIS_SELECTION^}" == "B" ] || [ "${THIS_SELECTION^}" == "C" ]; do
    read -n1 -p "Insert appropriate letter a, b or c: "  THIS_SELECTION
    THIS_SELECTION=${THIS_SELECTION^}
    echo;
done 

case "${THIS_SELECTION}" in
    A) echo A Donald ;;
    B) echo B Alan ;;
    C) echo C Brian ;;
    *) echo other ;;
esac

see stackoverflow