Recently, linking of which of the following rivers was undertaken?

The correct option is (B) because the Pattiseema Lift Irrigation Project, completed in 2015, successfully achieved the interlinking of the Godavari and Krishna rivers to divert surplus water from the Godavari to the water-deficient Krishna delta. While the Par-Tapi-Narmada link (Option D) is a major project under the National Perspective Plan, it remained in the planning and feasibility stages rather than active implementation at that time. This question tests the core concept of the National River Linking Project (NRLP) and its real-time application in India's water resource management.