The correct answer is option 1: Romania. Turkey does not share a border with Romania. Let`s look at the other options to understand why they are not the correct answers.
Option 2: Iran. Though Iran is a neighboring country of Turkey, it does share a border with it. Turkey and Iran are connected through a land border in the eastern part of Turkey.
Option 3: Georgia. Turkey does have a border with Georgia. The two countries share a border in the northeast region of Turkey.
Option 4: Bulgaria. Turkey also has a border with Bulgaria. The two countries share a border in the southeastern part of Bulgaria.
So, based on the given options, the only correct answer is option 1: Romania. Please note that the other options are incorrect because Turkey does have a border with Iran, Georgia, and Bulgaria.