Consider the following characteristics of medieval Indian architecture:

1. Islamic architecture in India during the Sultanate period is defined by the use of intricate tile work and large domes.
2. Mughal architecture is characterized by the fusion of Persian, Islamic, and Indian styles, evident in structures like the Red Fort and Humayun's Tomb.
3. The hammam or royal bath complex was a central feature of palace architecture, emphasizing the Islamic importance of cleanliness.
4. The Jaipur City Palace, constructed during the Rajputana era, employs Gothic Revival elements, marking a shift from traditional Indian styles.

Which of the statements are correct?