which of the following is a correct sentence?

সঠিক উত্তর: She denied that she had written the letter.
ব্যাখ্যা: This is the correct sentence because "had written" is the appropriate past perfect tense to describe an action before another past action.

ভুল অপশন ১: She denied that she had been written the letter.
ব্যাখ্যা: This is incorrect because "had been written" is passive voice, which changes the meaning of the sentence.

ভুল অপশন ২: She denied that she wrote the letter.
ব্যাখ্যা: This is not grammatically incorrect but less appropriate because "had written" better indicates a past action before another past action (the denial).

ভুল অপশন ৩: She denied that she has written the letter.
ব্যাখ্যা: This is incorrect because "has written" is present perfect, which is not appropriate when discussing a past event in this context.