सितंबर 1996 में व्यापक परमाणु परीक्षण प्रतिबंध संधि (CTBT) पर हस्ताक्षर की शुरुआत के पहले दिन कितने राज्यों ने हस्ताक्षर किए थे?

Consider the following statements regarding the Indus Waters Treaty (IWT): I. The Indus Waters Treaty was signed in 1960 with the World Bank playing a facilitative role in negotiations between India and Pakistan. II. Under the Treaty, India obtained unrestricted rights over the eastern rivers — Ravi, Beas, and Sutlej. III. The Permanent Indus Commission was created to facilitate data exchange and address technical disputes between the two countries. IV. India is completely prohibited from undertaking hydroelectric power projects on the western rivers allocated to Pakistan. How many of the above statements are correct?

Under the Nuclear Non-Proliferation Treaty (NPT), nuclear-weapon states are defined as those that manufactured and exploded a nuclear weapon or other nuclear explosive device prior to which date?