ইরিথ্রিটল হলো -

Irithritol is A non-caloric sweetener.

Here's a breakdown of the other options and why they are incorrect:

• An enzyme: Enzymes are proteins that act as biological catalysts. I erythritol is a small organic molecule and not a complex protein structure like an enzyme.
• An amino acid: Amino acids are the building blocks of proteins. I erythritol does not contain the nitrogen-based structure characteristic of amino acids.
• An anti-oxidant: While some research suggests erythritol may have some antioxidant properties, it's not its primary function.