Fill in the blank with the most appropriate word.

It is not easy to distinguish a loyal friend ______ a flatterer.

from

The correct word to fill in the blank is from.

• From is used to indicate a separation or distinction between two things. In this context, it means that it is not easy to distinguish a loyal friend from a flatterer.
• And is used to join two things together. It is not the most appropriate word to use in this context, as it does not indicate a separation or distinction between two things.
• Among is used to indicate a group of things. It is not the most appropriate word to use in this context, as it does not indicate a specific distinction between two things.
• Between is used to indicate a relationship between two things. It is not the most appropriate word to use in this context, as it does not indicate a distinction between two things.