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).
`("It is said")/a` `("that this room is not being opened")/b` `("for the last fifty years.")/c` `("No error")/d`

Answer

2

Explanation

has not been opened will replace is not being opened
The sentence structure is as follows :

Hence, that this room has not been opened is the right usage.