The correct answer is option 1, which states that the themes of the murals of the Ajanta Caves include decorative design, portraits of various Buddhas and Bodhisattvas, and narrative scenes portraying Jataka stories.

Option 1 is correct because the murals in the Ajanta Caves indeed showcase a variety of decorative designs. These designs often depict animals, trees, and flowers, adding a beautiful and intricate touch to the artwork.

Option 2 is also correct as the murals include portraits of various Buddhas and Bodhisattvas. These religious figures are depicted in different poses and postures, representing different aspects of Buddhist teachings and beliefs.

Option 3 is correct because the murals also depict narrative scenes portraying Jataka stories. Jataka stories are tales about the previous lives of the Buddha, showcasing various moral and ethical lessons.

However, option 4 is incorrect because it only includes two out of the three correct themes. The murals in the Ajanta Caves do include decorative design, but they also depict portraits of Buddhas and Bodhisattvas, as well as narrative scenes of Jataka stories.