Which of the following is not a type of business letter?a.Business enquiryb.Sales letterc.Quotationsd.Reference letter

To determine which of the options is not a type of business letter, we will analyze each option one by one:

a. Business enquiry: This is a type of business letter that is used to inquire about a product, service, or information related to a business.

b. Sales letter: This is also a type of business letter that is used to promote and sell a product or service to potential customers.

c. Quotations: This is not typically considered a type of business letter. Quotations are usually provided in response to a business enquiry or request for pricing information, but they are not a specific type of letter.

d. Reference letter: This is another type of business letter that is used to provide a recommendation or reference for an individual or a business.

Based on the analysis above, the option that is not a type of business letter is c. Quotations.