A traditional medium used in Jammu and Kashmir paintings is:

Gouache
Tempera
Oil
Acrylic

The correct answer is: b) Tempera.

Tempera is a painting medium made from pigments mixed with a water-soluble binder, usually egg yolk. It was the most common painting medium in Europe until the 15th century, when it was gradually replaced by oil paint. Tempera is still used today by some artists, particularly for miniatures and murals.

Gouache is a type of opaque watercolor paint. It is made from pigments mixed with gum arabic, which gives it a matte finish. Gouache is often used for illustrations and posters, as it can be applied in thick layers and dries quickly.

Oil paint is a type of paint made from pigments suspended in a drying oil, such as linseed oil. It is the most common type of paint used by artists today. Oil paint is slow-drying, which allows artists to blend colors and create subtle effects.

Acrylic paint is a type of paint made from pigments suspended in acrylic resin. It is a relatively new type of paint, having been developed in the early 20th century. Acrylic paint is water-soluble, but it dries quickly and becomes water-resistant once it is dry. It is often used for outdoor murals and signs, as it is durable and weather-resistant.

In Jammu and Kashmir, tempera is the traditional medium used in paintings. Tempera paintings are characterized by their bright colors and intricate details. They are often used to depict religious scenes or historical events.