Voluntary unemployment occurs when individuals choose not to work at the prevailing wage rate, even though they are capable of working. This could be due to personal preferences, job dissatisfaction, or expectations of higher wages.
Full employment equilibrium refers to a state where all willing and able workers are employed, and only voluntary unemployment exists. Involuntary unemployment is absent at this stage, meaning anyone who wants a job at the prevailing wage rate can find one.
Conclusion:
While both statements are true, the Reason (R) does not directly explain Assertion (A), hence option (B) is correct.