'Some pencils are pens' and 'all pens are erasers'. If both these statements are true then which of the following statement(s) is/are definitely true? I. All pencils are erasers II. Some erasers are pencils III. All erasers are pencils

প্রশ্নঃ 'Some pencils are pens' and 'all pens are erasers'. If both these statements are true then which of the following statement(s) is/are definitely true? I. All pencils are erasers II. Some erasers are pencils III. All erasers are pencils