Rhea Chakraborty, along with brother Showik Chakraborty, on Monday reached the DRDO guest house in Mumbai for the fourth round of questioning by the Central Bureau of Investigation (CBI) team investigating actor Sushant Singh Rajput's death case. Meanwhile, Goa-based hotelier Gaurav Arya reached the Enforcement Directorate office. His name had come up in Rhea's WhatsApp chats related to drugs.