The story Gandatindu Jataka was written in the language Pali, which is an ancient language primarily used for religious and philosophical texts in Theravada Buddhism. Pali is closely related to Sanskrit but differs from it in terms of grammar and vocabulary. It is important to note that Sanskrit, Telugu, and Tamil were not the languages in which this story was written.

Sanskrit is an ancient Indo-Aryan language that has been used for various religious, philosophical, and literary works. It is one of the oldest documented languages in the world and has influenced several Indian languages.

Telugu is a Dravidian language primarily spoken in the Indian states of Andhra Pradesh and Telangana. It has a rich literary tradition and has produced many notable works in different genres.

Tamil is another Dravidian language primarily spoken in the Indian state of Tamil Nadu and the union territory of Puducherry. It has a long literary history and has been used for various literary, religious, and philosophical works.

Therefore, the correct answer is option 4 - Pali.