Correct option is C
Human capital formation is the process of acquiring and increasing the number of persons who have the skills, education and experience which are essential for the economic and political development of a country. Thus, statement 2 is correct.
Intangible wealth of a nation is the skilled population, human resource base, culture, arts etc. Hence, statement 4 is also correct.
tatement 1 and 3 are incorrect because they are part of gross capital formation (GCF) representing physical capital.