In 2019 in Vietnam, money supply, Ms, was 2,500 trillion Vietnamese dong, the one year nominal interest rate, i, was 6 percent (i = 0.06), and money market was in equilibrium, Ms = kPY/i. If at the time, the propensity to hold money was k = 0.025, what was the nominal GDP, PY, of the Vietnamese economy in 2019?

a. 150 trillion Vietnamese dong

b. 1,042 trillion Vietnamese dong

c. 2,500 trillion Vietnamese dong

d. 6,000 trillion Vietnamese dong

e. 41,667 trillion Vietnamese dog