Which of the following statements is incorrect?
Choose one answer.
a. With reference to your application for a post as secretary, I am please to inform you that we would like you to start work as soon as possible.
b. Further to your order for some cupboards, I am sorry to tell you that we have had increase the price.
c. I am regret to inform you that our telephone conversation last week, I am happy to advise you that your car is now ready for you to collect.
d. I am writing in connection with your application for a post as secretary; I regret to inform you that you were not successful.