Explanation:

• The Directorate of Revenue Intelligence (DRI) is an Indian intelligence agency. It is India’s chief anti-smuggling intelligence, investigations and operations agency. The Directorate is run by officers from the Central Board of Indirect Taxes and Customs (CBIC) who are posted in its various Zonal Units as well as in Indian embassies abroad as part of the Customs Overseas Intelligence Network. It is headed by a Director General of the rank of Special Secretary to the Government of India. Hence option 4th is correct.