The correct answer is option 'A' - Maharashtra.

Explanation:
The Paramhansa Mandali was founded in 1849 in Maharashtra. This religious and social reform movement was initiated by a group of individuals who believed in the concept of one God and sought to break the rigid caste rules prevalent in society during that time.

1. Belief in One God:
The founders of the Paramhansa Mandali believed in the existence of a single God. They emphasized the unity and universality of the divine, rejecting the notion of multiple gods and goddesses worshipped by different castes and communities.

2. Breaking Caste Rules:
One of the primary objectives of the Paramhansa Mandali was to challenge and break the caste rules that had deeply divided society. Caste discrimination and untouchability were rampant in Maharashtra during that era, and the mandali sought to eradicate such practices.

3. Acceptance of Low Caste Food:
At their meetings, the members of the Paramhansa Mandali would eat food cooked by individuals from low castes. This act was significant as it went against the prevailing social norms, which dictated that upper caste individuals should not consume food prepared by lower castes.

4. Social Reform:
The founders of the Paramhansa Mandali were not only interested in religious reform but also in social reform. They aimed to foster equality, justice, and harmony within society by challenging the caste-based hierarchy and discrimination.

5. Origin in Maharashtra:
The Paramhansa Mandali originated in Maharashtra, which was a region deeply affected by caste divisions and social inequalities. The movement gained traction and support from like-minded individuals in the state who were eager to bring about positive change.

In conclusion, the Paramhansa Mandali was a religious and social reform movement founded in 1849 in Maharashtra. Its founders believed in one God and focused on breaking caste rules prevalent in society. The movement aimed to promote social equality and justice by challenging caste-based discrimination and accepting food cooked by low caste people at their meetings.