In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error. The number of that part is your answer. If a sentence is free from error, then your answer is (4) 1.e. No error.
My sister asked me/(1) that how long (2)/ I would stay there. (3)/ No Error. (4)

Answer

2

Explanation

that will not be used because - in Indirect Speech of Interrogative Sentences, that is not used. when a question begins with a question word (what, who, whom, when, where, why, how, etc.) the same word is used to introduce the question in the Indi rect Speech