What is royal regalia?

a.
jewels, scepters, and other artifacts of the reigning royal family.
b.
processed thin, smooth and durable animal hide used in the pre-printing age for written works.
c.
any type of royal clothing which has been individually created to display deity.
d.
a thin lay based liquid which is used in the production of ceramics as either a glue to hold pieces together, or as a paint.

The correct answer is A. Jewels, scepters, and other artifacts of the reigning royal family.

Explanation:

Royal Regalia is a term to describe clothes, accessories, and artifacts that are related to the royal family and are a symbol of it. This includes jewels, clothes, mantles, scepters, swords, among others. All of these elements are considered as valuable not only because they are often made using special materials but because they represent important historical figures. Additionally, most royal regalia elements are worn in ceremonies or special occasions. According to this, royal regalia can be defined as "Jewels, scepters, and other artifacts of the reigning royal family".