Five years ago, John bought a house and obtained a bank loan for an amount of R$2000000$

repayable over a period of $20$ years. The interest rate on the loan is $10\mathrm{.}5\%$ p$.$a$.$ and interest

accumulates monthly. The monthly instalment that John is liable to pay is:

a$.$ R$22107\mathrm{.}98$

b$.$ R$21916\mathrm{.}21$

c$.$ R$19794\mathrm{.}40$

d$.$ R$19967\mathrm{.}60$

e$.$ None of the above