Correct option is B
Myanmar is not a member of the South Asian Association for Regional Cooperation (SAARC), which is primarily a group of South Asian nations.
Options:
Pakistan: Founding member of SAARC.
Myanmar: Not a member of SAARC, though it is a part of other regional groups like ASEAN.
Afghanistan: Joined SAARC as its eighth member state.
Bhutan: One of the founding members of SAARC.