Explanation:

Only codes 1,3&4 are correct.

• South Asian Association for Regional Cooperation (SAARC) comprises of eight member States: Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, Sri Lanka
• The Shanghai Cooperation Organisation (SCO) currently comprises eight Member States: China, India, Kazakhstan, Kyrgyzstan, Russia, Pakistan, Tajikistan and Uzbekistan.
• The Colombo Security Conclave (CSC), was formed in 2011 as a trilateral maritime security grouping of India, Sri Lanka and the Maldives. It welcomed Mauritius as a fourth member.
• The South Asia Subregional Economic Cooperation (SASEC) Program, set up in 2001, brings together Bangladesh, Bhutan, India, the Maldives, Nepal, and Sri Lanka in a project-based partnership to promote regional prosperity by improving cross-border connectivity, boosting trade among member countries, and strengthening regional economic cooperation.

Hence option 3rd is correct.