The correct answer is option 'B' - 1, 3, 4.
The Balwant Rai Mehta Committee was constituted in 1957 to study the working of the Community Development Programme and the National Extension Service and to recommend measures for the reorganization of the Panchayati Raj institutions. The committee submitted its report in 1957, which laid the foundation for the establishment of a three-tier Panchayati Raj system in India. Let us see the details of the recommendations made by the committee:

1. Recommended establishment of a three-tier Panchayati Raj system:
The Balwant Rai Mehta Committee recommended the establishment of a three-tier Panchayati Raj system consisting of Village Panchayats at the village level, Panchayat Samitis at the block level, and Zila Parishads at the district level. This recommendation aimed at decentralizing power and decision-making to the grassroots level and ensuring effective local governance.

2. There should be direct elections for Panchayat Samiti:
The committee recommended that the members of the Panchayat Samiti should be elected directly by the people. This was a significant departure from the earlier system where the members were elected indirectly through the elected members of the Village Panchayats. Direct elections for Panchayat Samitis ensured greater accountability and representation of the people's will.

3. Establishment of a scheme of democratic decentralization:
The committee emphasized the need for democratic decentralization, where power and resources are decentralized to the local level. It recommended that the Panchayati Raj institutions should be given greater powers and responsibilities in areas like agriculture, health, education, and social welfare. This would enable the local bodies to address the specific needs and priorities of the local communities.

4. District collector should be the chairman of the zila parishad:
The committee recommended that the District Collector should be the chairman of the Zila Parishad. This was done to ensure coordination between the district administration and the Zila Parishad. The District Collector, being a government official, could provide administrative support and guidance to the Zila Parishad in implementing various development programs and schemes.

In conclusion, the Balwant Rai Mehta Committee recommended the establishment of a three-tier Panchayati Raj system, direct elections for Panchayat Samitis, a scheme of democratic decentralization, and the appointment of the District Collector as the chairman of the Zila Parishad. These recommendations aimed at strengthening local governance, promoting grassroots democracy, and ensuring effective implementation of development programs at the local level.