Change of speech choose the correct option I said to him “What is your plan?”

Change of speech choose the correct option I said to him “What is your plan?”
A: I asked him what was his next plan
B: I asked him that what was his next plan
C: I asked him about his next plan
D: I asked him what his next plan was

The direct speech changes to indirect with "I asked him what his next plan was" matching tense and structure making option D correct. Other options have errors. Proper indirect speech ensures grammatical accuracy especially in reported speech or narratives. This skill is vital for professional communication. Accurate indirect speech conveys conversations clearly particularly in reports or stories where precise reporting of dialogue enhances clarity and authenticity in various contexts.