Julius inherits R$2500000$ now. He decides to have it paid to him in two payments: one payment four years from now, and the other payment, three times the size of the first payment, ten years from now. The amount that he can expect to receive ten years from now, if an interest rate of $12,25\%$ per year, compoundec quarterly, is applicable, rounded to the nearest ten rand, is

a$.$ R$1650400.$

b$.$ R$1875000.$

c$.$ R$4951240.$

d$.$ R$2088850.$n