Which is the spiciest chili in world?

It's impossible to definitively say which chili pepper is the spiciest in the world for a few reasons:

* Subjectivity: Spice perception is very personal. Different people have different levels of sensitivity to capsaicin, the compound that makes chili peppers hot.

* Varying Growing Conditions: The spiciness of a chili pepper can vary significantly depending on factors like soil, climate, and even the specific plant variety.

* Constant Evolution: New chili pepper varieties are constantly being developed, with some exceeding the heat of previous record-holders.

However, some of the hottest chili peppers consistently mentioned as contenders include:

* Carolina Reaper: Widely considered the hottest pepper in the world for many years, with a Scoville Heat Unit (SHU) rating of 1.64 million to 2.2 million.

* Pepper X: A recent contender with a reported SHU rating of over 3 million. It's important to note that this pepper is still relatively new and hasn't been widely tested.

* Dragon's Breath: This chili pepper boasts a SHU rating of over 2.48 million, making it one of the hottest available commercially.

* Infinity Chili: With a reported SHU rating of 1.1 million, this pepper is known for its intense flavor and heat.

It's important to remember that eating extremely hot chili peppers can be dangerous. They can cause severe burning in the mouth, throat, and stomach, and may even lead to medical complications. Always handle and consume extremely spicy peppers with caution.