Evidence of Greco-Buddhist artistic styles can be observed at the site of:

Harwan
Burzahom
Akhnoor
Parihaspora

The correct answer is: a) Harwan.

Harwan is an archaeological site located in the Baramulla district of Jammu and Kashmir, India. The site is known for its Greco-Buddhist artistic styles, which can be seen in the ruins of the monastery and the stupa. The monastery was built in the 2nd century CE and was abandoned in the 7th century CE. The stupa was built in the 3rd century CE and is one of the largest in the region.

The Greco-Buddhist artistic styles at Harwan are a fusion of Greek and Buddhist art. The Greeks introduced the use of columns, arches, and other architectural elements to Buddhist art. The Buddhists introduced the use of Buddha images and other religious symbols to Greek art. The result is a unique style of art that is both beautiful and meaningful.

The other options are incorrect because they are not archaeological sites that are known for their Greco-Buddhist artistic styles.

  • Burzahom is an archaeological site located in the Srinagar district of Jammu and Kashmir, India. The site is known for its Neolithic and early Harappan remains.
  • Akhnoor is a town in the Akhnoor district of Jammu and Kashmir, India. The town is known for its historical importance.
  • Parihaspora is an archaeological site located in the Budgam district of Jammu and Kashmir, India. The site is known for its Kushan remains.