Step 1: Understanding the question.
The question asks which Indian state is the leading producer of sugar. Sugar production primarily depends on the cultivation of sugarcane, which requires fertile soil and adequate irrigation.
Step 2: Analysis of options.
(A) Bihar: Although sugarcane is grown here, Bihar is not the leading producer.
(B) Maharashtra: Maharashtra is also a major sugar-producing state but ranks second in overall production.
(C) Goa: Goa’s sugarcane cultivation is minimal; it does not contribute significantly to national production.
(D) Uttar Pradesh: Uttar Pradesh is the leading state in sugar production in India due to its large sugarcane-growing area and numerous sugar mills.
Step 3: Conclusion.
Thus, the correct answer is (D) Uttar Pradesh, as it is the top sugar-producing state in India.