Which sentence is correctly punctuated? a. by this time tomorrow night i will know, whether i can go with you. b. by this time, tomorrow night i will know whether i can go with you. c. by this time tomorrow night, i will know whether i can go with you. d. by this time, tomorrow night, i will know whether i can go with you.

Sincerely ✔

Explanation:

The above is the closing in this business letter.

A business letter is known to be a formal document (also known as an official letter) which is usually sent from one firm/office to another or from a company to its employees, clients or stakeholders. It is also used as a correspondence between individuals in the corporate world.

Such letters actually begins with a style of formality: the writer's address, the date and the recipient's address.

It is very important to keep business letters as concise and straight forward as possible. The closing remark is usually simple and short.

Some closing remarks used in formal letter are:

- Sincerely

- Best Regards

- Yours truly

- Regards

- Faithfully, etc.