Step 1: Understanding the Question:
The question asks about the current relevance or focus of the Non-Aligned Movement (NAM), especially after the end of the Cold War.
Step 2: Key Concept:
With the end of the Cold War and the dissolution of the Soviet bloc, the original purpose of 'non-alignment' between two superpowers became obsolete. NAM had to redefine its purpose to remain relevant.
Step 3: Detailed Explanation:
- (B) Military co-operation is antithetical to the very idea of NAM, which was formed to stay away from military alliances.
- (A) Political co-operation still exists, but it is a means to an end, not the primary relevance itself.
- (C) Social and economic development of member countries: This has become the new focus. In the post-Cold War era, NAM has shifted its focus to addressing the common challenges faced by its member states, which are mostly developing countries. These challenges include poverty, economic development, sustainable development, health crises, and advocating for a more equitable international economic order. This is often referred to as South-South cooperation.
Therefore, the contemporary relevance of NAM lies in promoting the socio-economic development of its members.
Step 4: Final Answer
The modern relevance of the Non-Aligned Movement lies in the social and economic development of its member countries.