Thangka paintings follow strict guidelines regarding:

Iconography and symbolism
Color palettes
Composition and perspective
All of the above

The correct answer is: d) All of the above

Thangka paintings are a type of Tibetan Buddhist painting that are traditionally used as religious aids. They are typically made on cotton or silk cloth and are painted with mineral pigments. Thangka paintings follow strict guidelines regarding iconography, symbolism, color palettes, composition, and perspective.

Iconography refers to the specific images that are used in thangka paintings. These images are often based on Buddhist texts and are carefully chosen to represent particular deities, concepts, or stories.

Symbolism is also an important element of thangka paintings. Symbols are used to represent a variety of things, such as religious concepts, natural phenomena, and human emotions.

Color palettes are also carefully chosen in thangka paintings. Each color has a specific meaning and is used to create a particular effect.

Composition refers to the way that the elements of a thangka painting are arranged. Thangka paintings typically have a central image that is surrounded by smaller images and symbols.

Perspective is also an important element of thangka paintings. Thangka paintings are often painted in a two-dimensional style, but they may also include elements of three-dimensional perspective.

All of these elements work together to create a thangka painting that is both beautiful and meaningful.