The task here is to spot which option fails to make a genuine common noun when attached to "news". Newsletter, newsstand, and newspaper are all ordinary words used daily. A newsletter is a short periodic bulletin sent to members of a group. A newsstand is the small shop or stall selling papers and magazines on the street. A newspaper is the printed sheet of daily or weekly news.
"Week" behaves differently from the rest. Combined with "news" it does not create a common English noun through normal compounding rules. "Newsweek" exists only as the trademarked title of a specific magazine, which is a proper noun, not a generic word anyone could use in a sentence the way "newspaper" is used.
Because three options form regular compound nouns and one forms only a brand name, the word that cannot be coupled with "News" to form a new common word is Week, option 2.
Which of the following does not make a sensible word/phrase when added to the given word?
Word: FIRE