Explanations:Chennai, the capital city of Tamil Nadu, has a rich history and a significant administrative presence. The city was originally known as Madras, a name that was officially changed to Chennai in 1996. This name change reflects the city's cultural and historical identity, as Chennai is a name derived from the ancient Chenna Kesava Perumal Temple, which is located in the Mylapore area of the city.
The Chennai Corporation, which is the local government body responsible for the administration of the city, operates from Ripon Buildings. Ripon Buildings, named after Lord Ripon, the Viceroy of India from 1880 to 1884, is a significant landmark in Chennai. The building was constructed in the late 19th century and has been the seat of the Chennai Corporation since its inception.
Regarding the comfort of woollen clothes in Chennai, it is important to consider the city's climate. Chennai has a tropical climate with high temperatures and humidity throughout the year. Woollen clothes, which are typically designed for colder climates, are not comfortable to wear in such a hot and humid environment. Therefore, the statement that woollen clothes are comfortable to wear in Chennai is not accurate.
In summary, the correct statements are that Chennai used to be called Madras and that the Chennai Corporation is operating in Ripon Buildings. The statement about woollen clothes being comfortable in Chennai is not true due to the city's tropical climate. Understanding these historical and administrative facts is crucial for anyone preparing for competitive examinations that include questions on Indian states and their general knowledge.