For what it’s worth, the classification “category 1” carcinogen does not indicate severity or level of risk. Everything that is carcinogenic is in category 1. If something is “maybe carcinogenic, unsure”, it’s category 2. Plutonium is in category 1, but so are alcoholic beverages and birth control pills.
You forgot to mention that group 2 is split into two categories
Group 2: 2A: cancer probable and 2B cancer possibly.
Group 3: not enough evidence.
Group 4: no evidence.
I think the meme reads better if you remove the explanation from the bottom. Also means people will ask what it's talking about, and can be directed to the information. Always let someone find something out themselves instead of telling them, they're a lot more likely to accept it