Which of the following was not a concern why Gandhiji took his last fast unto death in 1948?

Releasing imprisoned Muslims in India.

In January 1948, Gandhi undertook a fast unto death to protest the violence that had erupted in India after the partition. He was particularly concerned about the safety of Muslims in India, and he wanted to ensure that they could live in dignity and as equal citizens.
He was also concerned about the relations between India and Pakistan, and the Indian government's decision not to honour its financial commitments to Pakistan.
Gandhi's fast lasted for 18 days, and it had a profound impact on the country. The violence in Delhi subsided, and the Indian government agreed to pay Pakistan the money that it owed. Gandhi's fast also helped to raise awareness of the plight of Muslims in India, and it led to a number of reforms that improved their status.