Patna was known as Pataliputra during the Mauryan period. It was established as the capital by Chandragupta Maurya and became one of the largest cities in the ancient world.

While Dinabandhu Mitra depicted the Indigo Revolt through his play 'Nil Darpan', the actual revolts were against indigo planters. The movement occurred in Bengal and Bihar regions against exploitative indigo cultivation.

Under Emperor Ashoka, the Mauryan Empire extended across the entire Indian subcontinent from the Himalayas to the Deccan Plateau, covering regions in all directions.

Calculation: 10.3 crore × 63.8% = 10.3 × 0.638 = 6.5714 crore ≈ 6.6 crore (when rounded to nearest tenth crore).

Sarnath is located near Varanasi in Uttar Pradesh, not Bihar. However, many other important Buddhist sites are in Bihar including Bodh Gaya and Nalanda.

The Kosi River is a tributary of the Ganges River. It originates in the Himalayas and flows through Bihar before joining the Ganges.

East Champaran district is known for agricultural activities, though saffron is primarily cultivated in Jammu and Kashmir. This question tests regional knowledge of Bihar's agricultural areas.

Vaishali was the capital of the Lichchhavi republic, one of the earliest known republics in the world. It was also an important center during the time of Buddha and Mahavira.

The area of Bihar is approximately 94,163 square kilometers, making it the 13th largest state in India by area. It is one of the most densely populated states.

The Mahabodhi Temple Complex at Bodh Gaya is a UNESCO World Heritage Site. It dates back to the 5th-6th century and is one of the finest examples of brick temple architecture.