Option d is the correct answer. The Indian king who defeated Seleucus, the administrator of Sindh and Afghanistan appointed by Alexander, was Chandragupta. The Seleucid-Mauryan War took place between 305 and 303 BC, during which Chandragupta Maurya defeated Seleucus I Nicator, the ruler of the Seleucid Empire, and established his dominance over the regions of Sindh and Afghanistan. This war resulted in the Treaty of the Indus, in which Chandragupta secured control over the Indus Valley region and part of Afghanistan, marking a significant victory for the Mauryan Empire. As a part of the treaty, Seleucus gave his daughter's hand in marriage to Chandragupta, cementing a dynastic alliance between the two powers. Important Tips Kautilya's father, Acharya Chanak, was a renowned scholar in the court of King Dhananand of Magadh. This association led to Kautilya being referred to as Chanakya, as a way to acknowledge his lineage from his distinguished father. Rajashekhara, a 10th-century poet in Maharashtra Prakrit and Sanskrit, served the Gurjara Pratiharas as court poet. His notable works encompass the practical guide "Kāvyamimānsā," play "Kārpūramañjarī," and the Maharashtra Prakrit play "Kārpūramañjarī," an ode to his accomplished wife Avantisundari. Vishakhadatta, an Indian Sanskrit poet and playwright, authored the notable political drama "Mudrārākshasa," delving into the Maurya Dynasty era. His surviving play vividly portrays historical events. His style, while adhering to Sanskrit conventions, reveals a unique approach with a focus on substance. Another work, "Devichandraguptam," reconstructs through fragments how Chandragupta avenges his brother's treaty humiliation.