Option A is correct: The passage states (read concludes) that "anyone wing of such macro policy, monetary or fiscal, cannot independently work without the active support of another." Now, the Central Bank deals with the monetary policy, while the government looks after the fiscal policy of the country. Therefore, the statement in option (a) flows as a natural corollary to the conclusion provided in the passage.

Option B is incorrect: Though the statement might be right in its own sphere, but it is beyond the scope of this passage.

Option C is incorrect: Not only is the statement in this option beyond the scope of the passage, but it is also incorrect in its own right and a very extreme one. India, which follows a mixed economy, is a classic counter example to the assertion made in this option.

Option D is incorrect: To quote a standard definition, "The financial sector is a section of the economy made up of firms and institutions that provide financial services to commercial and retail customers. This sector comprises a broad range of industries including banks, investment companies, insurance companies, and real estate firms." The passage does not discuss financial sector reforms. Rather, it deals with the macroeconomic framework of monetary and fiscal policies, of which, the financial sector is just one (relatively) small aspect.