Find the odd one out

The odd one out is Option 3 - String:Camels

The other options are all correct collective nouns for the animals they are paired with. A pack of wolves, a litter of puppies, and a pod of dolphins are all terms that are commonly used to describe groups of these animals.

However, a string of camels is not a commonly used term. A more appropriate collective noun for a group of camels is a caravan or a flock.