you can't link a bank account in your country, you can only add a a card.
The U.S bank account option is there for U.S residents that may be working or living in your country. Because paypal is a U.S company it allows its residents to add there bank account to other countries paypal accounts.
You also can't withdraw funds from your paypal account in your country.
Click on the link below and select the country you want from the drop down list for options available in that country.