With reference to International Solar Alliance (ISA), consider the following statements :

a. It was conceived as a joint effort by India and Germany.

b. The Prague Declaration establishes ISA as an alliance dedicated to the promotion of solar energy among its member countries.

c. ISA is a coalition of solar resource-rich countries lying fully or partially between the Tropic of Cancer and the Tropic of Capricorn to specifically address energy needs by harnessing solar energy.

Which of the above statements is/are correct?