Explanation:

Economic and Social Justice is a foundational principle embedded in multiple parts of the Indian Constitution. (a) The Directive Principles of State Policy (DPSP) explicitly aim to establish a welfare state by promoting social and economic democracy, guiding the state to secure a social order for the promotion of welfare of the people (Article $38$). (b) The Fundamental Rights, while primarily ensuring civil and political rights, also contribute to social justice by prohibiting discrimination (Article $15$) and abolishing untouchability (Article $17$). (c) The Preamble itself declares India to be a Sovereign, Socialist, Secular, Democratic Republic and aims to secure to all its citizens 'Justice, social, economic and political'. Therefore, all three parts—the Preamble, Fundamental Rights, and Directive Principles of State Policy—collectively contribute to imparting economic and social justice to the citizens. Thus, (4) (a), (b) and (c) is the correct option.