Option c is the correct answer. Shashanka was the first independent king of a unified polity in the Bengal region, called the Gauda Kingdom. He reigned in the 7 th century CE and his capital was at Karnasubarna, in present-day Murshidabad in West Bengal. Kharavela was a king of the Mahameghavahana dynasty who ruled over Kalinga (present-day Odisha) in the 2nd or 1st century BCE. He is known for his military campaigns and patronage of Jainism. Simuka was the founder of the Satavahana dynasty, which ruled over parts of central and southern India from the 1st century BCE to the 3rd century CE. He is believed to have originated from present-day Telangana and Maharashtra region. Bhaskara Varman was a king of the Varman dynasty who ruled over Kamarupa (present-day Assam) in the 7th century CE. He was a contemporary and ally of Harsha and a rival of Shashanka .