Find out the error in the given sentence:
(a)I am told (b) John is ill (c) since Monday.

• Tenses are veritably important in English. They're one of the most pivotal corridor of alphabet. In order to convey the correct and intended meaning of a judgment , we've to use the correct tense.
• In the given judgment , the expression ‘ since Monday ’ has been used. This conveys to us that the action has been taking place continuously since Monday, and is still passing, because of the present tense used in ‘ John is ill ’.
• In similar situations, we use the Present Perfect Tense. This tense is constructed as follows has have been verb.
• So, the construction should have been “ I'm told John has been ill since Monday. ”
• I'm told- This expression is impeccably fine. The verb matches the pronoun, and the tense is correct for the judgment . So, this is an incorrect option.
• John is ill- here present perfect tense is used. So, this is the correct option.
• Since Monday- This is a impeccably correct expression. The adverb is correct and the proper noun is subsidized. So, this is an incorrect option.
• No error- This is an incorrect option, as we've formerly set up an error in the judgment.

Hence, option B is the correct answer.