Hi !!
Choose the correctly punctuated sentence below.
O We had no information as to where he was where did he go ==> FALSE no punctuation at all
We had no information as to where he was? Where did he go?
FALSE= first part isn't interrogative
O We had no information as to where he was, where did he go.
FALSE the second part is interrogative. it should have been "where he "went" ou "where he had been" to be correct
O We had no information as to where he was; where did he go?
a semi-colon is in between the first part which affirmative and the second part which refers to the same subject but is interrogative
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hope this helps :)