Explanation: Delhi, the capital city of India, is renowned for its historical significance and demographic prominence. The question revolves around three statements about Delhi, and we need to determine which of these statements are true.
1. **India Gate is a famous monument in Delhi.**
- India Gate is a war memorial located in the heart of New Delhi. It was built in memory of the Indian soldiers who died in World War I and the Third Anglo-Afghan War. The monument is a significant landmark and a popular tourist destination, making this statement true.
2. **The silk Karhana in Delhi had employees more than 40,000 workers.**
- The Silk Karhana, also known as the Silk Mill, was a significant industrial establishment in Delhi during the colonial era. It was one of the largest textile mills in India and employed a large number of workers. However, this statement is not relevant to the current status of Delhi. The Silk Karhana is a historical fact but does not reflect the current demographic or landmark status of the city.
3. **Delhi is the biggest city in India.**
- Delhi is the most populous city in India, with a population of over 30 million people. It is the largest city in terms of population and is a major metropolitan area. This statement is true.
The correct answer is (D) Only 1, 3. This option correctly identifies the true statements about Delhi. India Gate is indeed a famous monument, and Delhi is the biggest city in India by population. The statement about the Silk Karhana, while historically accurate, does not reflect the current status of Delhi and is therefore not relevant to the question.
Understanding the historical and current significance of Delhi is crucial for anyone studying Delhi's geography, demographics, and landmarks. This knowledge is particularly important for those preparing for competitive examinations related to Delhi's general knowledge.