What was the unique belief of the Sammitiya sect?

They believed in a 'pudgala' (person), a sort of enduring entity that transmigrates, which was controversial among other Buddhist schools that taught 'Anatta' (no-self).

Buddhist Sects: Sautrantika & Sarvastivadin Philosophy

Q: With reference to the religious history of India, consider the following statements: 1. Sautrantika and Sammitiya were the sects of Jainism. 2. Sarvastivadin held that the constituents of phenomena were not wholly momentary, but existed forever in a latent form. Which of the statements given above is/are correct?

Sarvastivadin is a Buddhist sect holding that phenomena exist in a latent form forever. Sautrantika and Sammitiya are also Buddhist, not Jaina, sects.

ID: HIS_PHI_2017_13 Ref: History of Indian Philosophy by S.N. Dasgupta

With reference to the religious history of India, consider the following statements:
1. Sautrantika and Sammitiya were the sects of Jainism.
2. Sarvastivadin held that the constituents of phenomena were not wholly momentary, but existed forever in a latent form.

Which of the statements given above is/are correct?