which of the following compouds can form a zwitterion

Hey,

To answer this, remember that amino acids are able to form zwitterions because they contain both an amino group and a carboxyl group. In its zwitterion, the carboxyl group has a negative charge and the amine group has a positive charge thus giving rise to a dipolar ion.

We know that a zwitterion is a molecule which contains both positively charged and negatively charged ions in it. It is also referred to as inner salt. Zwitterion has an equal number of positively charged and negatively charged functional groups.

As we can see it has an amine group but no carboxylic group. Therefore, it will neither form a zwitterion.
As we can see from the above discussion that only glycine can form a zwitterion.

I hope this helps