Step 1: Understanding the question.
The Human Development Index (HDI) is a composite index used to measure and rank countries based on human development factors like life expectancy, education, and per capita income. It was developed by Dr. Mahbub-ul-Haq.
Step 2: Analyzing the options.
(A) डॉ. महबूब-उल-हक: Correct — Dr. Mahbub-ul-Haq, a Pakistani economist, developed the Human Development Index in collaboration with Amartya Sen.
(B) रघुराम राजन: This is incorrect, as Raghuram Rajan was the former Governor of the Reserve Bank of India and did not develop HDI.
(C) मनमोहन सिंह: This is incorrect, as Manmohan Singh was the former Prime Minister of India and not the creator of HDI.
(D) इनमें से कोई नहीं: This is incorrect, as Dr. Mahbub-ul-Haq is the correct answer.
Step 3: Conclusion.
The correct answer is (A) डॉ. महबूब-उल-हक, as he developed the Human Development Index.