The correct answer is a) Kochi.
Muziris was an ancient port city on the Malabar Coast of India, located near present-day Kochi. It was an important center of trade between India and the Roman Empire. The city was mentioned in several Roman texts, including the Periplus of the Erythraean Sea and the Geography of Ptolemy.
Muziris was a thriving port city for centuries, but it declined in importance after the 7th century. The city was eventually abandoned, and its ruins are now located under the modern city of Kochi.
The other options are incorrect because they are not located near present-day Kochi.
b) Kozhikode is located about 100 kilometers north of Kochi.
c) Alappuzha is located about 150 kilometers south of Kochi.
d) Kollam is located about 200 kilometers south of Kochi.