Who put circles for the first time in Quran-e-Pak?

قرآن پاک میں پہلی بار حلقے کس نے لگائے؟

Imam Malik R.A

Imam Shafi R.A

Hazart Abu al-Aswad al-Du’ali RA

Hazrat Umar (R.A)

All of these

Abu al-Aswad devised a system of dots to signal the three short vowels (along with their respective allophones) of Arabic.