Correct option is C
The correct answer is (c) Rapid industrialisation with focus on heavy industries.
• The major goal of the Second Five-Year Plan (1956-61) was Rapid industrialisation with focus on heavy industries.
• The Second Five-Year Plan of India (1956-61) was based on the Mahalanobis model, also known as the Nehru-Mahalanobis model.
• The Second Five-Year Plan saw significant investments in public sector industries like steel plants (Bhilai, Bokaro, Durgapur), heavy engineering units, and power projects.
• This laid the foundation for India's industrial growth in the following decades.