No, the inner core is not the hottest part of the sun. The hottest part of the sun is actually the core, which is where nuclear fusion takes place.

Here's why:

* Core: The core is the densest and hottest part of the sun. It reaches temperatures of around 15 million degrees Celsius (27 million degrees Fahrenheit) and is where hydrogen atoms fuse to form helium, releasing immense energy.

* Inner Core: The inner core is a solid sphere within the sun's core, but it is still incredibly hot. It is not the hottest part, however, because it does not experience the same level of nuclear fusion as the core.

So, while the inner core is extremely hot, the core itself is even hotter because it is the primary location of nuclear fusion, the process that powers the sun.