Thangka paintings, a sacred Buddhist art form, depict:

The correct answer is: a) Deities, mandalas, and religious figures.

Thangka paintings are a sacred Buddhist art form that originated in Tibet. They are typically made on cotton or silk cloth and are painted with natural pigments. Thangkas depict a variety of subjects, including deities, mandalas, religious figures, and scenes from Buddhist history. They are often used as aids for meditation and prayer.

Option b) is incorrect because thangkas do not typically depict landscapes or scenes of everyday life. Option c) is incorrect because thangkas do not typically depict abstract patterns or geometric designs. Option d) is incorrect because thangkas do not typically depict historical events or battles.