They practice Islam religion.
They practice Roman Catholic religion
Buddhism is the religion. Buddhist practice Buddhism.
Kautilya was the chief adviser to the Emperor Chandra Gupta. Historians give him credit for much of the emperor's success. Kautilya served as an adviser, teacher and minister. He was born in 350 BC.
It is entirely up to you, how seriously you wish to practice your religion.
kautilya's saptanga theories are: The king. the minister. the country. the fortified city. the treasury. the army. the ally.
they practice the religion of pakarah, a ancient religion that revolves around the sun as the centerpiece of life.
kautilya
Chanakya
chanakyachachanakya
I guess you ment " what religion do hindu's practice?" If so, it is Hinduism.
Europeans mostly study (practice) the catholic religion.