The circulation of the newspapers and periodicals are calculated by the A.B.C on the basis of (A) National Readership Survey (B) Survey Conducted by Newspaper Management (C) Spot Study Conducted by the A.B.C. Staff (D) Study conducted by Information and Broadcasting Ministry Correct Ans: (A) Explanation: The Audit Bureau of Circulations (A.B.C.) uses the National Readership Survey (NRS) to calculate the circulation of newspapers and periodicals. This survey gathers comprehensive data on the readership habits of people across regions. By conducting these studies, NRS provides reliable statistics on how many people read specific publications. The NRS considers multiple factors, including the geographical reach, readership frequency, and demographics. It gathers responses directly from readers, ensuring accuracy and reliability in its reports. These insights are crucial for publishers and advertisers to understand their audience better. In addition, A.B.C. staff may conduct spot checks to verify data but rely primarily on NRS reports for official calculations. They focus on objective, data-driven methods to maintain their credibility. Unlike surveys conducted by newspaper management or the Ministry of Information and Broadcasting, the NRS remains independent and unbiased. Through its methodology, the NRS ensures a standardized approach, which helps media professionals gauge readership trends. This approach also provides advertisers with insights into the most effective platforms for their campaigns. Thus, the use of the National Readership Survey makes the process transparent and dependable. In conclusion, the NRS plays a pivotal role in determining accurate circulation numbers. This ensures that publishers and advertisers can base their decisions on verified and trustworthy data. The A.B.C.'s reliance on such surveys enhances its reputation as an objective authority in media metrics.