In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one, which best express the same sentence in Indirect/Direct speech. Teacher said to children, "Have you prepared well for the finals?"

• Teacher asked the children whether they have prepared well for the finals.
• Teacher asked the children whether they have been preparing well for the finals.
• Teacher asked the children if they did prepare well for the finals.
• Teacher asked the children if they had prepared well for the finals.