Bhoot (ghost)
The belief in ghosts is deeply ingrained in the minds of the people of India across generations. The various concepts of ghosts trace their roots in the vast bodies of Hindu mythology, its religious texts, literature and folktales. There are many allegedly haunted places in India, such as cremation grounds, dilapidated buildings, royal mansions, forts, forest bungalows, burning ghats, etc... Ghosts also occupy a significant place in the Bengali culture. Ghosts and various supernatural entities form an integral part of the socio-cultural beliefs of the both Hindu and Muslim communities of rural Bengal. Fairy tales often use the concept of ghost and references to paranormal activities are found amply in modern-day Bengali literature, cinema, radio and TV programmes.
Hinduism
Hinduism is an Indian religion and "dharma", or way of life, widely practised in the Indian subcontinent and parts of Southeast Asia. Hinduism has been called the oldest religion in the world, and some practitioners and scholars refer to it as "Sanātana Dharma", "the eternal tradition", or the "eternal way", beyond human history. Scholars regard Hinduism as a fusion or synthesis of various Indian cultures and traditions, with diverse roots and no founder. This "Hindu synthesis" started to develop between 500 BCE and 300 CE, after the end of the Vedic period (1500 BCE to 500 BCE), and flourished in the medieval period, with the decline of Buddhism in India. 
Although Hinduism contains a broad range of philosophies, it is linked by shared concepts, recognisable rituals, cosmology, shared textual resources, and pilgrimage to sacred sites. Hindu texts are classified into Śruti ("heard") and Smṛti ("remembered"). These texts discuss theology, philosophy, mythology, Vedic yajna, Yoga, agamic rituals, and temple building, among other topics. Major scriptures include the Vedas and Upanishads, the "Bhagavad Gita", and the Āgamas. Sources of authority and eternal truths in its texts play an important role, but there is also a strong Hindu tradition of questioning authority in order to deepen the understanding of these truths and to further develop the tradition.