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).
`("The train will not start")/a` `("untill the guard")/b` `("will blow the whistle.")/c` `("No error")/d`.

Answer

3

Explanation

blows the whistle will replace will blow the whistle because -
will is not used In a Conditional Clause, Simple Present Tense Is used.
Look at the examples given below:
I will wait until 1 `underset("Simple Present")underset(darr)("hear")` from you.
After until we use Present Tense to talk about the future.
Hence, blows the whistle Is the right usage.