Bizz, a cash-basis calendar-year taxpayer, died on August 14, 2017. The fair market value of Bizz’s estate at date of death was $10,720,000. What amount of Bizz’s estate is effectively tax-free if the exemption equivalent amount is fully available on his estate tax return?

a. $1,000,000

b. $5,000,000

c. $5,430,000

d. $5,490,000