Solve it if ur a genius 5 letter word

Solve it if ur a genius ...
I am a 5 letter word
If u remove my first letter
I will a country
If u remove 2 letters
I will be opposite of the word
If u remove 3 letters
I will be article
find the word !!!

Click here for Answer

Remove 1st OMAN which is a country
Remove 1st& 2nd MAN which is opposite of word WOMAN
Remove 1st, 2nd&3rd AN which is an article.