visa lottery

my case was denialed because i did not put my son name on my visa application(i 've won green card lotteryfor 2002)my lawyer said i dont have to listed my son on it because he was born in usa and is a citizen.who is right INS or lawyer?

my case was denialed because i did not put my son name on my visa application(i 've won green card lotteryfor 2002)my lawyer said i dont have to listed my son on it because he was born in usa and is a citizen.who is right INS or lawyer?