In the following question, some parts of the sentences have errors and some are correct . Find out which part of a sentence has an error. If a sentence is free error, your answer is (d).
`("We have been knowing")/a` `("each other")/b` `("since we were children")/c` `("No error")/d`.

Answer

1

Explanation

know/have known will replace have been knowing know is not used in Continuous forms. Hence, we know/have known is the right usage.