Explanation: To understand the context of the statements provided, it is essential to delve into the historical and geographical aspects of Delhi and its rulers.
1. **Khalji Dynasty (1290-1320 CE)**: The Khalji dynasty was a Turkic dynasty that ruled parts of the Indian subcontinent from 1290 to 1320 CE. The dynasty was founded by Jalal-ud-din Firuz Khalji and was succeeded by Alauddin Khalji, who expanded the empire significantly. The dynasty ended with the death of Nasir-ud-din Mahmud Shah in 1320 CE. Therefore, the statement that the Khalji dynasty ruled from 1290 to 1340 CE is incorrect.
2. **Lotus Temple (Delhi)**: The Lotus Temple, officially known as the Bahá'í House of Worship, is a prominent spiritual site located in Delhi, India. It is one of the most visited buildings in the world, attracting millions of visitors annually. The temple is known for its unique lotus-shaped design and is open to all, regardless of religion or background. This statement is true.
3. **Razia Sultan (1240 CE)**: Razia Sultan, also known as Razia al-Din, was the first female Muslim ruler of Delhi. She ruled from 1236 to 1240 CE. Razia Sultan was overthrown in 1240 CE, not BC 1240. The use of BC (Before Christ) is incorrect in this context, as the Common Era (CE) is the appropriate term for the period after the birth of Christ. Therefore, the statement is false.
In summary, the only true statement among the given options is that the Lotus Temple is located in Delhi. The Khalji dynasty's rule ended in 1320 CE, and Razia Sultan was overthrown in 1240 CE, not BC 1240. Thus, the correct answer is (A) Only 2,.