A Government Has a Single-Employer Defined Benefit Pension Plan for the Employees

A government has a single-employer defined benefit pension plan for the employees of its Electric Utility Enterprise Fund. At its December 31, 2019 fiscal year-end, the government had a total pension liability for the plan of $1,200,000 and the related pension's plan net position was $800,000. On December 31, 2020, the government had a total pension liability for the plan of $1,300,000 and the related pension's plan net position was $780,000. Assuming the net pension liability had been recorded in its Enterprise Fund on December 31, 2018 and there is no pension related deferred inflows or outflows of resources, what journal entry does the government need to make to record the government's net pension liability on December 31, 2020 in its Enterprise Fund?
a.
$\begin{array}{llr} \text { Pension expense} &500,000\\ \text { Net pension liability } &&500,000\\\end{array}$

b.
$\begin{array}{llr} \text { Pension expense} &400,000\\ \text { Net pension liability} &&400,000\\\end{array}$

c.
$\begin{array}{llr} \text { Pension expense } &120,000\\ \text { Net pension liability } &&120,000\\\end{array}$

d.
$\begin{array}{llr} \text { Pension expense } &520,000\\ \text { Net pension liability } &&520,000\\\end{array}$

e. None of the above.