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"In indirect questions, we can use - asked, inquired / wanted to know / wondered. We should not use ‘said’ in indirect question."
Those sentences, which ask questions, are called interrogative sentences. Every interrogative sentence ends at a sign of interrogation. Indirect question are always in statement form, therefore, question mark is dropped. We also drop Do, Dose and Did which are necessary in forming direct questions. We can use if/whether in indirect questions.