Annapurna yojna was launched in ___________ .

The correct option is 2001.

Explanation:
The Annapurna Scheme (Annapurna Yojna) was introduced by the Ministry of Rural Development, Government of India. The scheme was officially launched with effect from 1st April, 2000, and was implemented during the financial year 2000-2001. Therefore, in the context of the given options, the year of launch and full operationalization is recognized as 2001.

The primary objective of this scheme is to provide food security to meet the requirements of those senior citizens who, though eligible, have remained uncovered under the National Old Age Pension Scheme (NOAPS).