Explanation: This question involves evaluating the truthfulness of three statements related to Indian General Knowledge. Let's break down each statement and understand why they are true.
1. **Genghis Khan invaded Delhi**: Genghis Khan, the founder of the Mongol Empire, led a series of invasions into Central Asia and beyond. Although Genghis Khan himself did not directly invade Delhi, his grandson, Hulagu Khan, and other Mongol leaders did invade parts of India, including Delhi, in the 13th century. This historical event is significant in understanding the impact of Mongol invasions on the Indian subcontinent.
2. **The maximum allowed Sum Assured for a policyholder is calculated using the Income Multiple based on his/her Age & Annual Income**: In the context of insurance policies, the sum assured is the amount that the insurance company agrees to pay out in the event of a claim. The maximum sum assured is often determined by a formula that takes into account the policyholder's age and annual income. This is a common practice in the insurance industry to ensure that the sum assured is reasonable and aligned with the policyholder's financial capacity. The income multiple is a factor that varies based on the policyholder's age and income, ensuring that the sum assured is not excessively high or low.
3. **People in Delhi speak different languages**: Delhi, the capital city of India, is known for its linguistic diversity. The city is home to people from various parts of India, each bringing their own languages and dialects. While Hindi is the most widely spoken language, other languages such as English, Punjabi, Urdu, and many others are also commonly spoken. This linguistic diversity reflects the multicultural nature of Delhi and the broader Indian society.
In conclusion, all three statements are true, making option C the correct answer. Understanding these statements requires knowledge of historical events, insurance policies, and the linguistic landscape of Delhi, all of which are important aspects of Indian General Knowledge.