Correct : English Grammar

The sentence asks about the person who was coming to see us. We need to choose the option that forms a grammatically correct indirect question.
Analyze the Options:
A) you said: "Who you said was coming..." is grammatically correct. The question is formed by placing "you said" after "who" in an embedded question.
B) did you say: "Who did you say was coming..." is also grammatically correct and is the natural direct-question form.
C) did you say that: "Who did you say that was coming..." is not appropriate in this sentence because "that" should not be used here between "say" and the relative/embedded question structure.
D) had you: "Who had you was coming..." is grammatically incorrect.
Correct Answer: B) did you say