Step 1: Understanding the question.
This question is asking about the classification of Singrauli. Singrauli is a major coal mining hub located in Madhya Pradesh, known for its mining industries.
Step 2: Analyzing the options.
(A) राजधानी नगर: Singrauli is not a capital city.
(B) खनन नगर: Correct — Singrauli is primarily a mining city, with significant coal and mineral extraction.
(C) पर्यटन नगर: This is incorrect as Singrauli is not known as a tourist city.
(D) इनमें से कोई नहीं: This is incorrect.
Step 3: Conclusion.
The correct answer is (B) खनन नगर, as Singrauli is primarily known for its mining activities.