Find the error in the sentence and replace it with the suitable word.…

The correct answer is Option (1) → (B) Only

"Mind" + -ing form:

• The verb mind is followed by the -ing form (gerund), never by a to-infinitive.
• "Do you mind + -ing?" is a polite request.
• This sentence: "Do you mind to close the window?" should be "Do you mind closing the window?"
  Example: Would you mind waiting for a few minutes?

(A) closed — Incorrect.

• The past form "closed" cannot follow "mind": "Do you mind closed the window?" is not English.

(B) closing — Correct.

• Closing is the -ing form that "mind" takes.

(C) mound — Incorrect.

• A mound is a small heap of earth or a small hill.
• The error is not in "mind".

(D) minded — Incorrect.

• After the helping verb do, the main verb stays in the base form: "Do you mind", not "Do you minded".

Tip: In this question the options do not follow the order of the statements (Option 1 = (B) Only, Option 2 = (A) Only, Option 3 = (D) Only, Option 4 = (E) Only). NTA often jumbles the options in this way, so after finding the correct statement, read the options carefully and mark the one with the right letter.