Explanation:

- Option 1: Social infrastructure

- Refers to facilities and systems that support the social needs of a community or nation. This includes schools, hospitals, housing, and cultural institutions.

- Option 2: Human capital

- ?? Represents the collective skills, knowledge, abilities, and experiences of people in a nation.

- It's considered a vital productive resource, similar to physical resources.

- Option 3: Physical capital

- Consists of tangible assets like machinery, buildings, and infrastructure which are used in production.

- Option 4: None of these

- Indicates that none of the provided options correctly describe the given statement.