Step 1: Understanding indicators of development.
Development of a country is measured through various economic and social indicators. These indicators help in understanding the overall well-being of the people.
Step 2: Important indicators.
Literacy rate shows the educational level of the population. Health status reflects the quality of healthcare and living standards. Per capita income indicates the average income and economic condition of the people.
Step 3: Analysis of the options.
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(A) Literacy rate: It is an important indicator.
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(B) Health status: It also measures development.
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(C) Per capita income: It indicates economic development.
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(D) All the three above: Correct, because development is measured using all these factors.
Step 4: Conclusion.
Thus, development of a country is indicated by all three factors mentioned.
Final Answer:} All the three above.