Identify the correct speech for the sentence given below. Riya said, "How can I do such a foolish mistake"?

(1) Riya told how could she do such a foolish mistake. This option uses "told" which implies direct narration. However, the original sentence is a question, so "told" is not appropriate. Additionally, the word order is awkward, and it lacks the appropriate tense. The correct form should use "could" instead of "can" to match the past tense. Therefore, this option is incorrect. (2) Riya asked how can she do such a foolish mistake. This option uses "asked," which indicates a question, but it does not correctly reflect the original statement because the original statement is not really a question that the person is asking to others but rather herself as in a contemplation or introspection. Additionally, the word order is incorrect, and the tense of "can" should be changed to "could" to match the past tense in the original sentence. Thus, this option is incorrect. (3) Riya suggested how she can do such a foolish mistake. This option uses "suggested," which implies proposing an idea or a course of action, but it does not fit the context of the original sentence. Also, the word order is not appropriate, and the tense of "can" should be changed to "could" to match the past tense in the original sentence. Therefore, this option is incorrect. (4) Riya thought how she could do such a foolish mistake. This option correctly uses "thought," which reflects the process of thinking or pondering about something. The tense is also correct, as "could" is used to match the past tense in the original sentence. The word order is appropriate, (it should be ‘she could’ and not ‘could she’ and the meaning accurately represents the original sentence. Therefore, this option is correct. So, option (4) is the correct choice because it maintains the correct tense, word order, and meaning of the original sentence. Riya is reflecting on her action, which fits the context provided.