দুর্নীতি আমাদের দেশে ‍উন্নয়নে বড় বাধাঁ । what is the correct translation of the sentence?

Corruption is regarded as the main bar to the country's development.

Corruption is the main bar to our prosperity.

Corruption is the hindrance of the country.

Corruption is the biggest bar to the prosperity of the country. _.