Option (a) is correct:
The Kaladan Multi-Modal Transit Transport Project (KMMTTP) is a strategic infrastructure initiative jointly undertaken by India and Myanmar. It is designed to connect India's northeast with Southeast Asia, serving as a strategic link to ASEAN nations.
The India–Myanmar–Thailand (IMT) Trilateral Highway is one of the most important India–ASEAN connectivity projects. It is a major ASEAN–India connectivity initiative.
The Agartala–Akhaura Rail Line is a bilateral connectivity project between India and Bangladesh (not an ASEAN member).
Source:
thediplomat.com/2024/02/has-the-indian-flagship-kaladan-project-in-myanmar-hit-a-dead-end/
economictimes.indiatimes.com/news/roads-highways/india-myanmar-thailand-highway
theprint.in/india/india-bangladesh-rail-link-via-agartala
The Notification for the Civil Services Examination, 2021 was released by the Commission on March 04, 2021. The notification contains all the details related to the examination dates, number of vacancies, eligibility criteria, syllabus, application process, fee, exam centers etc. The exam is being conducted to fill in 712 vacancies as listed in the notification with 22 vacancies reserved for Persons with Benchmark Disability. The Preliminary examination will be held on October 10 2021. Candidates can visit the Commission’s website  to fill the application form. Detailed instructions for filling up online applications have been provided on the website. The application window was closed on March 24 2021. The admit cards for the Preliminary Examination were made available from September 16 2021. The admit cards can be downloaded from the Commission’s website on the above mentioned link.