Explanation: The question revolves around a specific incident that occurred in Delhi, involving individuals who were arrested for betting on the Indian Premier League (IPL) cricket matches. The IPL is a popular cricket league in India, and betting on sports events is a common practice, although it is illegal in many parts of the country, including Delhi.
In this particular incident, the individuals involved in the betting operation were using walkie-talkies to communicate with each other and to stay one step ahead of the police. Walkie-talkies are handheld, two-way radios that allow for real-time communication over short distances. The use of such devices made it difficult for the police to intercept their communications and track their activities.
The incident highlights the challenges faced by law enforcement agencies in curbing illegal betting activities. The use of technology, such as walkie-talkies, complicates the task of surveillance and detection. It also underscores the need for more sophisticated methods and technologies to combat such illegal activities.
Delhi, being the capital city of India, is a hub for various activities, including sports betting. The incident in question took place in Delhi, making it the correct answer. The other options, such as Mongolia, Chennai, and Kolkata, are not associated with this specific incident. Mongolia is a foreign country, while Chennai and Kolkata are other major cities in India but not the location of this particular event.
Understanding the context of this incident is important for students preparing for competitive examinations related to Delhi, such as the Delhi Police Constable exam, Delhi Civil Services, and the UPSC Prelims. It is essential to be aware of current affairs and specific incidents that have occurred in the city, as these can be tested in various forms in such examinations.
In summary, the correct answer is Delhi because it is the location where the IPL betting scandal involving the use of walkie-talkies to evade police surveillance took place. This incident highlights the ongoing challenges in law enforcement and the need for advanced methods to combat illegal activities.