Question

(a) The guards (b) dare not (c) to harm him.

• A. (a)
• B. (b)
• C. (c)
• D. No error

Answer 1

The correct option is C (c)

The option with the error is the correct option.
Option C: The error lies in "to harm him". The correct form should be "harm him". (The guards dare not harm him.) 'To' along with the base (harm) forms an infinitive which does not perform as the verb itself in a sentence; it refers to the base form of the verb. In order to express an action by the verb, the 'to' must be removed. (You say 'I love red' and not 'I to love red.') Hence C is the correct option with the error.
Option A: This part "The guards" has no error, it's the subject, made of the article 'the' and the noun 'guards'. Hence option A is incorrect.
Option B: Similarly, the part "dare not" has no error, dare is a modal verb that refers to a threat or a challenge. Hence this option is also incorrect.
Option D is incorrect because the error lies in C.