I had my car repaired / had to repair my car

[abo.omar]

My car was repaired. This means that I ………..….

a had my car repaired b had to repair my car

c had repaired my car d will have to repair my car
My answer is a. Bu I think b is OK.

 

[Chasint]

b is incorrect in my opinion. Can you explain your reasoning for believing it to be correct?