The correct indirect speech from the given options is:
B] He said that Alex would ring the bell.
Here's an explanation for why this option is correct:
1. The original direct speech is "Álex must ring the bell" which indicates a future action that is necessary to be done.
2. In indirect speech, when reporting a future action, the modal verb "must" changes to "would." So, "must" changes to "would" in the reported speech.
3. Therefore, the correct indirect speech should be "He said that Alex would ring the bell."
This option correctly reflects the future action and necessity of ringing the bell as conveyed in the original direct speech.
