Why is it believed that the paintings in the Shangri Ramayana set were created by different sets of artists?

The style varies from one painting to another.

The correct answer is option 4- The style varies from one painting to another.

There is a broad classification of three styles — Basohli, Guler and Kangra, and scholars may have variant terms for the same. However, these are indicative centres from where the style travels elsewhere. Hence, in Jasrota, as one observes the Guler style, it becomes categorised under the Guler School with Jasrota as one of its centres. Briefly mentioning the aspects of the other centres, one finds portraits of the rulers of Chamba in the seventeenth and early eighteenth century in the Basohli style.