Explanation:

- HDI (Human Development Index) is measured using three main indicators:

- Life Expectancy at Birth (shows health and longevity).

- Real GDP per capita (shows standard of living, also called Gross National Income per capita).

- Education (measured by mean years of schooling and expected years of schooling for children).

- Infant Mortality and Morbidity (rate of illness) are not directly included in HDI calculation, though they reflect health.

- Option 2 (i, ii, and iii) is correct, because only Real GDP per capita and Life expectancy at birth are directly used; Infant mortality is related but not used, and Morbidity is not at all used.

- Other options include Morbidity, which is not considered in HDI.

Correct Answer: Option 2 (i, ii, and iii) are correct.