Which one is correct indirect narration of the statement below: Karim said, "I read a book every day".

সাধারণত, reported speech যদি Present indefinite হয়, তাহলে এর Indirect narration এ Past indefinite হয়।
কিন্তু, reported clause দ্বারা যদি Universal truth/ Historical event/ Natural phenomena/Mathematical equations/ Moral Principles and Proverbs/ Habitual action (a part of the daily routine) বুঝায় তাহলে Indirect speech এ এর tense পরিবর্তিত হয় না; reporting verb টি যে tense ই হোক না কেন।

উদাহরণ:
Habitual Action:
Direct: Rahim said, "We play cricket every day."
Indirect – Rahim said that they play cricket every day.

Direct: Karim said, "I read a book every day".
Indirect: Karim said that he reads a book every day.

Scientific Statements:
Direct: The teacher said to the children, “Water freezes into ice below 0°C.”
Indirect: The teacher told the children that water freezes into ice below 0°C.

Moral Principles and Proverbs:
Direct: “Honesty is the best policy.” They said.
Indirect: They said that honesty is the best policy.

Natural Phenomena:
Direct: I said, “Water is colourless.”
Indirect: I said that water is colourless.

Mathematical Equations:
Direct: “Five and five make ten.” Said the girl.
Indirect: The girl said that five and five make four.

Historical Event:
Direct: Our teacher said to us, “The Liberation War took place in 1971.”
Indirect: Our teacher told us that the Liberation War took place in 1917. [had taken হবে না]