Concept:After Mahatma Gandhi’s cremation, his ashes were immersed at a sacred river confluence.
Explanation:Mahatma Gandhi was assassinated on 30 January 1948 in Delhi.
After his funeral, most of his ashes were taken to Allahabad (now Prayagraj) in Uttar Pradesh.
There, they were immersed in the Ganges River at the Triveni Sangam.
This is the holy meeting point of the Ganges, Yamuna, and mythical Saraswati rivers.
Hindus consider this site especially sacred for final rituals.
Hence, the ashes were not immersed in Ahmedabad, Delhi, or Porbandar, but at Allahabad.
Answer:B. Allahabad (present Prayagraj)