The city of Rajgir in Bihar is associated with ancient history as well as being a pilgrimage site for:

Buddhism and Jainism
Hinduism and Sikhism
Islam and Christianity
Zoroastrianism and Judaism

The correct answer is: Buddhism and Jainism.

Rajgir is an ancient city in the Indian state of Bihar. It is located in the foothills of the Himalayas, about 100 kilometers from Patna, the state capital. Rajgir is a popular tourist destination, known for its historical and religious sites.

The city was founded in the 6th century BC by Ajatasatru, the king of Magadha. It was the capital of Magadha during the reign of the Buddha. The Buddha visited Rajgir several times and gave many discourses there.

Rajgir is also an important pilgrimage site for Jains. The 24th Tirthankara, Mahavira, spent the last 12 years of his life in Rajgir. He attained nirvana at Pavapuri, a few kilometers from Rajgir.

The city is home to several Buddhist and Jain temples and monasteries. The most important Buddhist site is the Gridhrakuta Hill, also known as Vulture Peak. The Buddha gave many discourses on Vulture Peak, including the famous Dhammacakkappavattana Sutta, in which he set forth the Four Noble Truths.

The most important Jain site is the Shanti Niketan, also known as the Peace Park. The park is located on the spot where Mahavira attained nirvana.

Rajgir is a beautiful and historic city with a rich religious and cultural heritage. It is a popular tourist destination and a pilgrimage site for Buddhists and Jains.

Here is a brief explanation of each option:

  • Buddhism and Jainism: Rajgir is an important pilgrimage site for both Buddhists and Jains. The Buddha gave many discourses on Vulture Peak, also known as Gridhrakuta Hill, and Mahavira attained nirvana at Pavapuri, a few kilometers from Rajgir.
  • Hinduism and Sikhism: Rajgir is not an important pilgrimage site for Hindus or Sikhs.
  • Islam and Christianity: Rajgir is not an important pilgrimage site for Muslims or Christians.
  • Zoroastrianism and Judaism: Rajgir is not an important pilgrimage site for Zoroastrians or Jews.