N5
どの
Which (of three or more), What (kind)
どの飲み物がいい？
Which drink would you like?
Explanation
「どの」 means 'which …' and goes before a noun, asking which one among three or more people or things: 「どの人」 (which person), 「どの部屋」 (which room), 「どの国」 (which country). With only two choices use 「どちらの＋noun」.
Mixed up with
「どれ」 is a pronoun and cannot take a noun after it; 「どの」 must be followed by a noun: 「どの本」, not 「どれ本」.
「どの＋noun＋も」 means 'every …', and with a negative 'none of …': 「どの料理も美味しい」 (every dish is delicious), 「どの部屋にもエアコンがある」 (every room has air conditioning).