Puran Chand, a Hindu, was the Diwan under which of the following ruler?

Correct option is C

Puran Chand, a Hindu official, served as the Diwan under Nizam-ul-Mulk, the founder of the Asaf Jahi dynasty in Hyderabad. Nizam-ul-Mulk, also known as Asaf Jah I, was appointed as the Viceroy of the Deccan by Mughal Emperor Farrukhsiyar and later established the autonomous state of Hyderabad.

Additional knowledge

Sa'adatullah Khan I or Sa'adatullah Khan was Nawab of Carnatic (r.1710–1732). He was an adventurer from Konkan in Maharashtra.
Murshid Quli Khan (c. 1660 – 30 June 1727), also known as Mohammad Hadi, was the first Nawab of Bengal, serving from 1717 to 1727.In 1717, he was appointed as the Nawab Nazim of Murshidabad by Farrukhsiyar. During his reign, he changed the jagirdari system (land management) to the mal jasmani, which would later transform into the zamindari system. He also continued sending revenues from the state to the Mughal Empire.
Alivardi Khan was the fourth Nawab of Bengal from 1740 to 1756. He toppled the Nasiri dynasty of Nawabs by defeating Sarfaraz Khan in 1740 and assumed power himself. During much of his reign Alivardi encountered frequent Maratha raids under Raghuji Bhonsle, culminating in the surrender of the province of Orissa in a peace settlement in 1751. He also faced separatist rebellions in Bihar as well as a revolt from his grandson Siraj ud-Daulah.He maintained a politically neutral stance with the European powers in the subcontinent.