Step 1: Identify the sentence type.
The given sentence is an imperative sentence because it expresses a command or instruction. While converting such sentences into indirect speech, the reporting verb is changed to words like told, ordered, advised, or asked.
Step 2: Use the infinitive form.
In indirect speech, imperative sentences are usually converted using the structure:
Reporting verb + object + to + verb.
Thus the phrase becomes “to go and wash”.
Step 3: Change the pronoun.
The pronoun “your” refers to Reena, so in indirect speech it becomes “her”.
Step 4: Form the correct sentence.
Therefore, the correct indirect speech sentence is:
My father ordered Reena to go and wash her hands.
Final Answer: My father ordered Reena to go and wash her hands.