Q: Passage: The first season of Spring Baking Championship premiered on April 25, 2015. The second season of the series premiered on April 10, 2016, and concluded on May 15, 2016. The third season premiered on March 12, 2017, with Jesse Palmer replacing Deen as host. The fourth season premiered on March 12, 2018, with Ali Khan replacing Palmer as host.

Question: Based on this passage, who is the host of season 4 spring baking championship?
Let's give stream of consciousness below
This is the relevant information: The fourth season premiered on March 12, 2018, with Ali Khan replacing Palmer as host. So the answer is Ali Khan.