The correct answer is Myanmar.
The South Asian Association for Regional Cooperation (SAARC) is an intergovernmental organization that promotes economic, social, cultural, technical, and scientific cooperation among its member states. The eight member states are Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka.
Myanmar is not a member of SAARC because it was not invited to join the organization when it was founded in 1985. The reasons for this are not entirely clear, but it is likely that Myanmar’s military government at the time was not considered to be a reliable partner for cooperation.
In recent years, Myanmar has made significant progress towards democracy and economic development. As a result, there have been calls for Myanmar to be invited to join SAARC. However, so far, these calls have not been successful.
The main reason for this is that India is opposed to Myanmar’s membership. India has long-standing security concerns about Myanmar, and it is worried that Myanmar’s membership in SAARC would give it greater influence in the region.
It is possible that Myanmar’s membership in SAARC could be approved in the future, but this is likely to depend on a number of factors, including the progress that Myanmar makes towards democracy and economic development, and the willingness of India to change its position.