哪個拼音才對？

Which one is the correct pinyin representation of "中"?
Jung? Chung? Zhong? Jhong?

You can go to Wikipedia to see the following items:
Romanization of Chinese (漢字拉丁化)
Chinese language romanization in Taiwan (臺灣的中文羅馬拼音)

And also 維基百科Wikipedia：

● 注音符號 Zhù yīn fú hào (Bopomofo) Eng VietNam
● 漢語拼音 Hànyǔ Pīnyīn Eng VietNam

Source: 網際智慧股份有限公司