Stage play is correct. In stage plays, characters’ names are centered and capitalized.
Scientific journal is incorrect. Scientific writing must be clear, concise, accurate, and objective. A journal article may include original research, re-analyses of research, reviews of literature in a specific area, proposals of new but untested theories, or opinion pieces.
Poetry anthology is incorrect. Instead of paragraphs, poems are written in stanzas, groups of lines that contain a central idea.
Business memo is incorrect. Business memos convey needed information (and thus need to be straightforward) and must include a To line, a From line, a Date line, a Subject line, and the actual body of the message.