Explanation:

• The India-U.S. foundational agreement for mutual logistics support, the Logistics Exchange Memorandum of Agreement (LEMOA) was signed in 2016.
• US-India concluded the third foundational agreement, Communications Compatibility and Security Agreement (COMCASA), which is meant for secure encrypted communications, in 2018.
• The Industrial Security Agreement (ISA) signed in 2019 is part of the General Security of Military Information Agreement (GSOMIA).
• The General Security of Military Information Agreement (GSOMIA), which is for information safety, was signed in 2002.
• The last one remaining is the Basic Exchange and Cooperation Agreement for Geo-spatial Cooperation (BECA).

Hence option 4th is correct.