What are the official languages of the U.N.O. ?

The United Nations has six official languages: Arabic, Chinese, English, French, Russian and Spanish [1]. The UN’s official-languages page and related UN materials list these six languages and describe their role in interpretation and document translation across the Organization [2]. Option 4 enumerates English, French, Chinese, Russian, (Arabic, written as “Arabian” in the option) and Spanish, which corresponds to the six official UN languages and is therefore correct. The other choices either omit one or more of these six languages or include languages (e.g., Hindi or German) that are not official UN languages.

Sources

1. [1] https://www.un.org/en/our-work/official-languages
2. [2] https://languages.un.org/en/six-official-un-languages