The correct answer is: b) Kulasekhara Dynasty.
The Kulasekhara Dynasty was a Hindu dynasty that ruled over Kerala from the 12th to the 14th centuries. They were patrons of the arts and sciences, and they built many temples and palaces. The famous Jewish Synagogue in Kochi was built during their rule.
The Chera Dynasty was a Hindu dynasty that ruled over Kerala from the 3rd century BCE to the 12th century CE. They were patrons of the arts and sciences, and they built many temples and palaces. However, there is no evidence that they were patrons of the Jewish community.
The Zamorins of Calicut were a Muslim dynasty that ruled over Malabar from the 14th to the 16th centuries. They were not patrons of the Jewish community.
The Portuguese arrived in Kerala in the 15th century, and they built many churches and forts. They were not patrons of the Jewish community.
The Jewish community in Kerala has a long and rich history. They first arrived in Kerala in the 8th century CE, and they have been living there ever since. The Jewish Synagogue in Kochi is one of the oldest synagogues in the world, and it is a UNESCO World Heritage Site.