i) OPEC
ii) BRICS 
iii) MGC
iv) EAS
v) BBIN

a) The trilateral agreement was signed between India, Afghanistan and Iran.
b) It has led to the establishment of transit and transport corridor among three countries using Chabahar port.
c) This port is seen as golden gateway for India to access landlocked markets of Afghanistan and Central Asia bypassing Pakistan.

i) Brazil
ii) Russia
iii) India
iv) China
v) South Africa

i) Indo - Afghan relation was strengthened by the Strategic Partnership Agreement.
ii) SPA provides assistance to rebuild Afghan's infrastructure, institutions, agriculture, water, education, health and providing duty free access to the Indian market.

i) Pakistan
ii) Nepal
iii) Sri Lanka
iv) Afghanistan
v) Maldives
vi) China
vii) Bhutan
viii) Bangladesh
ix) Myanmar

OPEC:
i) It is a group of oil producing nations (i.e. Iraq, Iran, Kuwait, Saudi Arabia).
ii) Its membership is open to any country that exports crude oil.
OPEC'S mission:
i) To co-ordinate oil policies in its member countries.
ii) Help stabilise oil markets.
iii) To secure fair and stable income to petroleum producers.
iv) An efficient, economic and regular supply of oil to consuming nations.
v) A fair return on capital to those investing in the petroleum industry.
Helps other countries:
i) It helps finance projects with low interests loans.
ii) It provides grants to social and humanitarian projects.
iii) It has an Information centre with over 20,000 volumes including books, reports map and conference proceedings related to petroleum, energy and the oil market.
iv) It is open to the public and for the rescarchers and students.