What is the proper action to take when questions are answered in comments?

None of the comment flag options seems appropriate:

• rude or offensive
• not constructive
• obsolete
• too chatty
• other…

Should a comment be made suggesting that an existing comment should be an answer? Or should this just be ignored?

Examples:

• Gmail account from old phone to new Galaxy S7
• http://android.stackexchange.com/questions/154180/im-reseting-my-phone
• http://android.stackexchange.com/questions/154128/release-new-android-apk-in-store-that-drops-support-will-users-still-be-able-to
• Is it possible to give root access to some apps without unrooting smartphone?
• please help me; my galaxy s duos2 keeps restarting