DV 2011: Birth City Unknown?

[no_trying]

No Birth City in my Birth Ceritificate but my Passport of my naturalized country has a city name, which is same as my province in birth certificate.

What should be checked, "Birth City Unknown" or put the city on naturalized passport or put city that my parents tell which is different from the naturalized passport?

 

[raevsky]

Birth City Unknown in the form and what you parents tell during the interview