Explanation:

- Statutory machinery refers to organizations created by legislation to fulfill specific governmental functions.

- Option 1: Central Implementation and Evaluation Committee - Primarily an advisory and evaluation body, not statutory machinery.

- Option 2: Central Board for Workers' Education - Engages in non-statutory educational activities for workers’ development.

- Option 3: Standing Labour Committee - Acts as a consultative body rather than statutory machinery.

- Option 4: Employee's State Insurance Corporation - Correct. Established by the Employee's State Insurance Act, 1948, it functions as statutory machinery at the central level, managing insurance for workers.