उत्तर : 2. "ब्रिस्बने ( ऑस्ट्रेलिया )"
व्याख्या :

Brisbane is not a former capital of Australia. The other cities are all former capitals of their respective countries: 

Karachi: The capital of Pakistan from 1947 to 1959

Auckland: A former capital of New Zealand

Kyoto: A former capital of Japan

Brisbane was the capital of Australia before Canberra from 1842 to 1859.