Explanation:

- The Self-Help Group (SHG) Bank Linkage Programme was indeed launched by NABARD in 1992. It aims to provide microcredit through the formation of SHGs that are linked to banks to facilitate access to financial services for the poor.

- NABARD, or the National Bank for Agriculture and Rural Development, plays a key role in rural development and has been instrumental in promoting financial inclusion.

- SIDBI, or the Small Industries Development Bank of India, primarily focuses on the growth and development of micro, small, and medium enterprises (MSMEs) in India.

- RRBs, or Regional Rural Banks, provide banking facilities to rural areas and primarily lend to the agriculture sector and rural industries.

- IRMA, or the Institute of Rural Management Anand, is known for its educational and research contributions in rural management and is not involved in the direct implementation of microcredit projects.