"relevant comment" is correct and usable in written English.
It refers to a statement or opinion that is pertinent or applicable to the topic being discussed. Example: During the class discussion, the professor encouraged students to ask questions and make relevant comments about the assigned reading.
The selection of "Candle in the Wind" comes closest to making a relevant comment on the work's stated premise.
We have taken turns to sit next to the Dalai Lama and talk to him about environmental issues and he has been extremely attentive, interrupting us to seek clarification or to make a relevant comment.
One of which was Sung whose grammatically correct and relevant comment landed him the first spot.
Our interest in this topic was aroused by sources of relevant comment concerning early uses of DEB identified in Chambers' An Accounting Thesaurus (1995).
In other words, you don't want to start a wine tasting and have every relevant comment about the wine followed by dozens more unrelated ones about anything from how great the weather is in New Orleans right now, to what Obama should do about Guantanamo Bay or why someone's putting off emptying their dishwasher before you get to the next relevant tweet.
This means that every relevant comment from FriendFeed, Reddit, Digg, Twitter, and even comments from other blogs that link to the original post can be automatically imported, allowing readers to follow the conversation on your blog no matter where it is taking place on the web.
"Gareth only listens to relevant comments.
But of the remaining, relevant, comments, more than two-thirds told the US it had to move away from governance of the internet.
That and his declaration when arrested – "I did it for my country" – were his only relevant comments before he said he didn't remember shooting Kennedy.
First, the village board, led by Mayor Michael Kalnick, must decide that all of the relevant comments have been made and that it is time to close the public hearings.
When I turned to Weibo, the Chinese Twitter and perhaps the country's largest and most loose-lipped neighborhood, I found that many Zhang posts had been deleted and relevant comments had been blocked from view.
