Step 1: Understanding the question.
This question is asking about the leading state in cotton production in India. Gujarat is the largest producer of cotton in India.
Step 2: Analyzing the options.
(A) गुजरात: Correct — Gujarat is the leading producer of cotton in India due to its favorable climate and extensive irrigation systems.
(B) झारखंड: This is incorrect, as Jharkhand is not a major cotton-producing state.
(C) बिहार: This is incorrect, as Bihar is not a major cotton producer.
(D) ओडिशा: This is incorrect, as Odisha is not a leading state in cotton production.
Step 3: Conclusion.
The correct answer is (A) गुजरात, as it is the leading state in cotton production.