Q：Q has a defined benefit pension plan and prepares financial statements to 31 August 20X2. The following additional information is relevant for the year ended 31 August 20X3.
　　Interest on plan assets was $60 million.
　　The unwinding of the discount on the pension liability was $30 million.
　　The current service cost was $45 million.
　　The entity granted additional benefits to existing pensioners that vested immediately and that have a present value of $10 million. These were not allowed for in the original actuarial assumptions.
　　The entity paid pension contributions of $40 million.
　　The net pension liability are as follows:
　　31.8.20X3    31.8.20X2
　　$40m            $35m
　　Ignoring deferred tax, what is the actuarial gain or loss arising in the year ended 31 August 20X3?
　　A. A gain of $20 million.
　　B. A loss of $10 million.
　　C. A loss of $20 million.
　　D. A loss of $5 million.
　　A：The correct answer is: A loss of $20 million
　　Opening liability                                             35
　　Interest on plan assets                               (60)
　　Unwinding of discount                                 30
　　Current service cost                                     45
　　Additional benefits                                        10
　　Pension contributions                                 (40)
　　Actuarial loss (balancing figure)                 20
　　Closing liability                                               40