An important archaeological site near the Chaliyar River that has yielded prehistoric artifacts is:

Nilambur
Malappuram
Palakkad
Kozhikode

The correct answer is: A) Nilambur

Nilambur is a town in the Malappuram district of Kerala, India. It is located on the banks of the Chaliyar River. The town is known for its historical and archaeological sites.

The Chaliyar River is a major river in Kerala. It originates in the Western Ghats and flows through the districts of Palakkad, Malappuram, and Kozhikode. The river is a major source of irrigation and drinking water for the people of Kerala.

The archaeological site of Nilambur is located on the banks of the Chaliyar River. The site has yielded prehistoric artifacts, including stone tools and pottery. The artifacts date back to the Stone Age and the Bronze Age.

The archaeological site of Nilambur is a significant site for the study of the history of Kerala. The site provides evidence of the early human habitation of Kerala. The site is also a popular tourist destination.

The other options are incorrect because they are not located near the Chaliyar River.

Option B: Malappuram is a district in Kerala. It is located in the northern part of the state. The district is known for its historical and cultural heritage.

Option C: Palakkad is a district in Kerala. It is located in the central part of the state. The district is known for its scenic beauty and its historical and cultural heritage.

Option D: Kozhikode is a city in Kerala. It is located in the northern part of the state. The city is known for its commercial and industrial importance.