Option a is the correct answer. Manusmriti is also known as Manav Dharam Shastra, is mainly related to the social system. It's divided into 18 chapters. It is presumed that the actual human author of this compilation used the eponym 'Manu', which has led the text to be associated by Hindus with the first human being and the first king in the Indian tradition. Manu is also considered to be the originator of law in India.