The question of which is the hottest chilli in the world is one that is often debated. There are many types of chilies known for their heat like the Carolina Reaper, the Ghost Pepper, the Trinidad Scorpion, and the Bhut Jolokia, also known as the Ghost Pepper. Each of these strains has a high level of heat and has its own set of followers and admirers.
The Carolina Reaper is considered the hottest chili in the world, measured by the Scoville Heat Unit (SHU) value, with an average value of 1.5 million SHU and can even reach up to 2.2 million SHU.
The Ghost Pepper also has a high heat level of around 1 million SHU and the Trinidad Scorpion can reach up to 2 million SHU. The Bhut Jolokia used to have a heat level of 1 million SHU and was therefore the hottest chili in the world, but there are now varieties that are even hotter.
It's important to note that the hotness of chilies can also be affected by many factors such as growing conditions, age of the fruit, and even the time of year. Also, sensitivity to sharpness varies from person to person.
Overall, it's hard to say which is the hottest chilli in the world, as there are many factors that affect how hot it is, and sensitivity to hotness varies from person to person. It is important to consider your own sensitivity to heat and to be careful with very hot chillies. However, if you're looking for an extra spicy experience, the Carolina Reaper, Ghost Pepper, Trinidad Scorpion, and Bhut Jolokia are all great options worth trying.