Mekong-Ganga Cooperation Project is

The Mekong–Ganga Cooperation (MGC) is a multilateral initiative launched in 2000 by six countries—India, Cambodia, Lao PDR, Myanmar, Thailand and Vietnam—to promote cooperation primarily in tourism, culture, education and transport & communications. Its foundational objective is to facilitate closer contacts among peoples of the two major river basins (Ganga and Mekong) and to promote tourism and cultural linkages across the region, including projects like the Asian Traditional Textiles Museum and joint tourism programmes[2]. Therefore, among the given options, MGC is best described as a joint tourism (and broader cultural/educational) initiative of some Asian countries.

Sources

1. [1] https://www.mea.gov.in/Portal/ForeignRelation/Brief_MGC_March_2017.pdf
2. [2] https://embindpp.gov.in/pages?id=penRe&subid=DbDxb