A group of bananas can be referred to by several collective nouns, depending on the context. Here are the most common ones:

• Hand: This is the most common collective noun for a group of bananas. A hand of bananas is made up of several attached "fingers".

• Bunch: A bunch of bananas is another common term for a group of bananas. It refers to all the bananas growing together off the same stem.

• Cluster: A cluster of bananas refers to a group of many hands of bananas arranged for sale or a religious ceremony.

• Comb: A comb of bananas refers to a group of tiny bananas at the end of a stalk of bananas.

• Bushel: This term is used when you have more than five bananas but not quite a "bunch".

• Stalk: This term is used to refer to the entire stem of bananas.

In conclusion, a group of bananas can be called a hand, bunch, cluster, comb, bushel, or stalk, depending on the context.