Change into indirect speech:
She said, "I have lost my keys."

• Answer: খ) She said that she had lost her keys.

- মূল বাক্য present perfect tense এ আছে।
- Reported speech এ tense past perfect এ পরিবর্তিত হয়।
- “Have lost” থেকে “had lost” হয়েছে।
- বাক্যের অর্থ অপরিবর্তিত।
- তাই সঠিক উত্তর হলো “She said that she had lost her keys.”

Other options:
ক) She said that she lost her keys.
- "have lost" → "lost" নয়, বরং "had lost" হওয়া উচিত।

গ) She said that she has lost her keys.
- Reporting verb অতীত হলে, Reported Speech-এর tense পরিবর্তন হওয়া উচিত।

ঘ) She said that she loses her keys.
- Present Indefinite হয়ে গেছে, যা অর্থ ও tense উভয়ই ভুল।

Source: A Passage to the English Language, S.M. Zakir Hussain.