Which of the following option is correct with regard to macro finance?

Correct option is D

The correct option is  (d) Both (a) and (b), based on the provided answer source.
(a) It is a broad concept and focuses the whole nation: Macro finance involves large-scale financial initiatives and policies, such as government subsidies or large infrastructure projects, that aim to improve the entire economy.
(b) There is no risk at all because the main aim is to give benefit to the economy: According to certain specific definitions used in the context of comparative studies, macro-finance is described as having no individual default risk (unlike micro-finance) because the focus is on the overall economic benefit and policy implementation challenges, rather than individual failure. However, in standard economic terms, macro-finance involves significant risks, such as systemic or political risks, which can impact the entire financial system and the economy.