We have five fingers ____ each hand. Choose the correct answer-

The complete sentence is:

We have five fingers on each hand.

Here's why:

• "On" is the most natural and idiomatic preposition to use when referring to the location of fingers on a hand.

• "In" implies that the fingers are inside the hand, which is not accurate.

• "For" doesn't make sense in this context and doesn't express the spatial relationship between the fingers and the hand.

• "With" could be used in some figurative contexts, but it's not the most common or idiomatic choice for this sentence.

So, for clear and natural expression, "on" is the best choice to complete the sentence.