"Illegal" drugs are drugs that are frequently illegal (e.g., Marijuana, Cocaine, Heroin, LSD). This question refers to content created by the developer and official contributors (e.g. an editor for a news app) of the app and not content created by users. Note that this question should be answered "yes" even if the illegal drugs are referred to in an educational context.
The word "can" is used primarily due to the fact that the content of news apps changes frequently and the idea here is to ascertain the maximum level of content that would be allowed in the app.