Answer : 4. "Australia"
Explanation :

The Cabinet chaired by the Prime Minister Narendra Modi has approved the signing and ratification of the Mutual Recognition Arrangement between the Central Board of Indirect Taxes and Customs (CBIC) and the Australian Border Force. The objective of this arrangement is to provide mutual benefit to accredited and trusted exporters of both the signatories in the clearance of goods by the customs authorities of the importing country.