He asked (1)/ that how long (2)/I would be absent. (3)/ No error (4).

Options

A. 1 He asked
B. 2 that how long
C. 3 I would be absent.
D. 4 No error

Answer

2

Explanation

that will not be used because - Interrogative sentences with wh, or Q.wds. when changed into Indirect speech, no Conj. will be used.
Look at the examples given below:
He said, "What are you doing here ?" (D.S.)
He asked what I was doing there. (I.S.)
She said, "Where are you going ?" (D.S.)
She asked where I was going. (I.S.)
Hence, how long will replace that how long