which one is the right answer?

You are considering an investment in a Third World bank account that pays a nominal annual rate of 18%, compounded monthly. If you invest $4,900 at the beginning of each month, how many months would it take for your account to grow to $285,000? Round fractional months up. O a. 42 months O b. 29 months O c. 22 months O d. 14 months O e. 34 months