This is the first site that popped up on Google.
http://www.thoughtco.com/jellyfish-and-man-of-war-stings-608404
Which of the following substances would be most effective in relieving pain caused by a man- of- war
(1) tap water (2) club soda (3) lipstick (4) perfume
(5) lemon juice
3 answers
Further research shows that vinegar or lemon juice may not be the best relief. Several sites mentioned sea water.
What does your text say?
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I found the site Ms. Sue found, also. Club soda and lemon juice are the only two choices that are acidic.