In which method of filing, all the letters and documents are passed in the book in chorological order?

The correct answer is: B. Bound book

A bound book is a type of filing system in which documents are placed in chronological order. This type of filing system is often used for letters, invoices, and other documents that need to be kept in order by date.

A box file is a type of filing system in which documents are placed in a box. This type of filing system is often used for documents that do not need to be kept in order by date, such as reports and manuals.

A metal holder is a type of filing system in which documents are placed in a metal holder. This type of filing system is often used for documents that need to be kept in order by subject, such as contracts and agreements.

A pillar file is a type of filing system in which documents are placed in a pillar. This type of filing system is often used for documents that need to be kept in order by location, such as blueprints and maps.