zain has purchased a motor cycle worth rs.40000 from his friend who has given him the following options:

a) pay rs.52000 at the end of four years.

b) pay rs. 12000 annually at the end of next 4 years

c) pay rs.16000 annually at the end of next 3 years

d) pay the full payment now

select the best option if Zain's cost of fund is 10%