Explanation: To understand the context of the statements, we need to delve into the geography, history, and administrative structure of Mumbai.
**Geography and Location:**
Mumbai is located on the western coast of India, specifically on the Konkan coast. The Konkan coast stretches from the western part of Maharashtra to Goa. The Coramandel coast, on the other hand, is located on the eastern coast of India, primarily in the states of Tamil Nadu and Andhra Pradesh. Therefore, the first statement that Mumbai is located on the Coramandel coast is incorrect.
**Historical Context:**
Bombay, now known as Mumbai, was not an ancient town. It was primarily developed during the British colonial period in the 18th and 19th centuries. The city was formed by merging seven islands and was developed into a major port and commercial center under British rule. Hence, the second statement that Bombay is an example of an ancient town is also incorrect.
**Urban Administration:**
In India, urban areas are governed by different administrative bodies based on their size and population. Smaller towns are typically managed by municipalities, which are local self-governing bodies. Larger cities, especially metropolitan cities like Mumbai, are governed by municipal corporations. A municipal corporation has a larger administrative structure and more responsibilities compared to a municipality. Therefore, the third statement that a large metropolitan city like Mumbai is looked after by a municipal corporation is correct.
In summary, the correct answer is (C) Only 3, as it is the only true statement among the given options. The first and second statements are incorrect due to geographical and historical inaccuracies, while the third statement correctly identifies the administrative body responsible for managing a large metropolitan city like Mumbai.