The correct answer is: A. Portuguese.
The Chapora Fort is a 16th-century Portuguese fort located in Chapora, Goa, India. It was built by the Portuguese in 1510, shortly after they captured Goa from the Adil Shahi sultanate of Bijapur. The fort was built on the site of an earlier Hindu fort, and it was used by the Portuguese to control the trade routes between Goa and the Arabian Sea. The fort is now in ruins, but it is still an important historical site.
The Abhiras were a Hindu dynasty that ruled parts of India from the 6th to the 8th centuries. They are not known to have built any forts in Goa.
The Adil Shahi sultanate was a Muslim sultanate that ruled parts of India from the 15th to the 17th centuries. They are known to have built several forts in Goa, including the Aguada Fort and the Reis Magos Fort. However, they did not build the Chapora Fort.
Therefore, the correct answer is: A. Portuguese.