Explanation:

- Option 1: Equal

- The real wage rate is equal to the Marginal Productivity of Labour.

- Classical economists believe in a competitive market where wages adjust to reflect the productivity of workers.

- Option 2: More

- This would imply workers are paid more than their contribution to output, which is unsustainable in the long run for employers.

- Option 3: Less

- Suggests exploitation, as workers earn less than their productivity, though classical theory typically considers the market self-correcting.

- Option 4: None of these

- This would imply a different relationship, which doesn't align with classical economic theory.