Select the option that expresses the given sentence in Direct to Indirect Speech.
She said, "Who knows the answer?"

Correct option is D

The correct indirect speech is (d) She asked who knew the answer.
Rules of conversion (Wh-question):
· Reporting verb said + question → change to asked/inquired.
· Keep the Wh-word ( who) and change question order to statement order (subject before verb).
· Backshift the tense because the reporting verb is past: knows → knew.
· Remove quotation marks and the question mark.
· Therefore: She said, “Who knows the answer?” → She asked who knew the answer.
Why others are incorrect:
(a) told requires an object ( told me/us) and keeps present knows; wrong.
(b) Keeps present knows; tense not backshifted.
(c) is knowing is unidiomatic (stative verb know not in continuous) and keeps said instead of asked.