✅ Answer: A) 1 and 3 onlyStatements 1 and 3 are correct. Aryabhata proposed the heliocentric theory (Earth rotates on its axis). Nalanda was founded by Kumaragupta I. Statement 2 is incorrect — Kalidasa was a Navratna of Chandragupta II (Vikramaditya), not Chandragupta I. Chandragupta I was the first great Gupta king who established the Gupta era.

✅ Answer: C) HarishenaThe Allahabad Pillar Inscription was composed by Harishena, the court poet (and minister) of Samudragupta. It describes Samudragupta’s military campaigns in detail — earning him the title “Napoleon of India” from V.A. Smith. The inscription is in Sanskrit and Brahmi script on the same pillar that has Ashokan edicts.

✅ Answer: B) Surgical procedures and instrumentsSushruta is called the “Father of Surgery” because his Sushruta Samhita describes 300+ surgical procedures, 120+ surgical instruments, and various surgical techniques including rhinoplasty (plastic surgery of the nose). Charaka is the “Father of Ayurveda” (internal medicine). Sushruta’s work was translated into Arabic and influenced medieval European surgery.

✅ Answer: B) 319/320 CEThe Gupta era begins in 319/320 CE — associated with Chandragupta I’s coronation. The Saka era (78 CE) is associated with Kanishka. The Vikrama era (57 BCE) is associated with Vikramaditya. Aryabhatiya was written in 499 CE. The Gupta era is used in some traditional Indian calendars.

✅ Answer: C) MilindapanhaMilindapanha (Questions of Milinda) records the philosophical dialogue between King Menander (Milinda) and Buddhist monk Nagasena. Menander was so impressed by Nagasena’s answers that he converted to Buddhism. Milindapanha is an important Buddhist text and historical source for the Indo-Greek period.

✅ Answer: C) Western ShakasChandragupta II (Vikramaditya) defeated the Western Shakas of Gujarat and Malwa, extending the Gupta Empire to the Arabian Sea. This victory earned him the title “Vikramaditya” (Sun of Valour). He shifted his capital to Ujjain — strategically important for western trade. Skandagupta repelled the Huna invasions.

✅ Answer: B) Every 5 yearsHarshavardhana organised the Prayag Assembly (Mahaparyushana) every 5 years at Prayag (Allahabad). He distributed all his accumulated wealth to the poor, scholars, and religious institutions. Xuanzang witnessed one such assembly and described it in detail. After distributing everything, Harsha reportedly had to borrow clothes from his sister.

✅ Answer: C) Encyclopaedia of astronomy, astrology, and natural scienceVarahamihira’s Brihat Samhita is an encyclopaedia covering astronomy, astrology, meteorology, botany, architecture, and many other subjects. Varahamihira was one of the Navratnas of Chandragupta II. He also wrote Panchasiddhantika (five astronomical systems) and Brihat Jataka (astrology).

✅ Answer: B) ShakasThe Nasik inscription describes Gautamiputra Satakarni as the “Destroyer of Shakas, Yavanas (Greeks), and Pahlavas (Parthians).” He was the greatest Satavahana king who revived the dynasty after a period of Shaka domination. The inscription was composed by his mother Gautami Balashri.

✅ Answer: C) Kushana dynastyGandhara art developed during the Kushana period (1st–3rd century CE) in the Gandhara region (modern Pakistan/Afghanistan). It is a blend of Indian Buddhist themes and Greek (Hellenistic) artistic style. Key feature: Buddha depicted in human form for the first time. Kanishka was the greatest patron of Gandhara art.