Question

When you are a teenager , there are some ( какое слово нужно вставить a) misunderstanding b)misunderstandings c) mistake d) problem ) between you and your parents

Answer 1

Misunderstandings 
a не подходит тк ед число, с b и c тоже самое. 

Answer 2

The correct word to insert in the sentence is "misunderstandings," so the sentence would read: "When you are a teenager, there are some misunderstandings between you and your parents."