Step 1: Understanding the Question:
The question identifies the most recent and comprehensive "flagship" nutrition scheme launched by the Central Government.
Step 2: Detailed Explanation:
• ICDS (Integrated Child Development Services) is the oldest program (launched in 1975).
• JSY and JSSK focus primarily on institutional delivery and maternal/infant health services rather than a broad "nutrition mission."
• Poshan Abhiyan (PM's Overarching Scheme for Holistic Nourishment) was launched in March 2018. It is the current flagship mission.
• Its specific goals include reducing stunting, under-nutrition, anemia (among young children, women, and adolescent girls), and low birth weight.
• It aims to use technology (real-time monitoring), convergence between different ministries, and a "Jan Andolan" (people's movement) to achieve a malnutrition-free India by 2022.
Step 3: Final Answer:
The most recent flagship program is Poshan Abhiyan.