a)readb)readsc)readingd)readedThe correct answer is “read.” Explanation: The verb “read” is irregular and is the same in both the present and past tense. In the present, when used with I, it remains “read” (pronounced as /red/ in the past tense, but as /riːd/ in the present). The other options are incorrect: “reads” is used with third-person singular subjects (he, she, it). “reading” is the present participle form, used in continuous tenses (e.g., “I am reading”). “readed” is not a correct form of the verb; “read” is used for both the present and past tense. So the sentence should read:I read a book.