Identify the correct sentence.

• Sequence of Tense এর নিয়মানুযায়ী, 
• প্রথম clause টি present হলে, এরপরের clause টি present/past/future যেকোনো tense এ হয়ে পারে।
- অর্থাৎ, Present + Present/past/future.
- সুতরাং, নিয়মানুযায়ী সঠিক উত্তর - All of these.

• Complete sentence: 
1. The speaker says that he knows the answer to the question.
2. The speaker says that he knew the answer to the question.
3.The speaker says that he will know the answer to the question.