The correct answer is: A. reproduction
A facsimile is a copy or reproduction of an original document or object. It is often used to create a duplicate of a document that is too fragile or valuable to be handled frequently. A facsimile can be created using a variety of methods, including photocopying, scanning, and faxing.
A reproduction is a copy or imitation of something. It can be created using a variety of methods, including painting, sculpture, and photography. A reproduction is often used to create a copy of a work of art that is too expensive or difficult to obtain the original of.
A sincere person is honest and genuine. They are not trying to deceive or mislead others. A sincere person is often seen as trustworthy and reliable.
An original is the first or earliest version of something. It is often considered to be the most authentic or authoritative version. An original can be a work of art, a document, or an object.
An engineered object is one that has been designed and built by humans. It can be a machine, a structure, or a product. Engineered objects are often used to solve problems or meet specific needs.
In conclusion, the antonym of facsimile is reproduction. A facsimile is a copy or reproduction of an original document or object, while a reproduction is a copy or imitation of something.