The question is about the script used in the Ashokan inscriptions found in Afghanistan.

Option 1 suggests Brahmi which was indeed used in many Ashoka`s inscriptions in India, but not in Afghanistan. Option 2 proposes Sharada, a script primarily used in Kashmir and nearby regions, which is not associated with the Ashokan inscriptions. Option 3 suggests Kharoshthi, which was used in the northwestern regions of ancient India, but again, not for inscriptions in Afghanistan.

The correct answer is option 4, the Greek-Aramaic script. During Ashoka`s rule, his inscriptions were written in the language and script of the local populace to make them accessible. In Afghanistan, which had seen Greek settlement during the conquests of Alexander the Great, a bilingual (Greek-Aramaic) script was used, thereby making the Greek-Aramaic script the correct answer.