Correct Answer: Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Solution : The correct answer is (a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.

The assertion states that human capital is a determinant of economic productivity. Human capital refers to the skills, knowledge, and abilities that individuals possess, which can be developed through education, training, and experience. The reason provided is that skilled individuals are more efficient and effective in their work, leading to increased productivity. This is accurate because individuals with higher levels of human capital are equipped with the necessary skills, expertise, and problem-solving abilities to perform tasks more effectively and efficiently. They can apply their knowledge and skills to improve processes, innovate, and find solutions to challenges, which ultimately enhances productivity in various sectors of the economy. Therefore, both the assertion and the reason are true, and the reason correctly explains the assertion.