একজন নতুন শিক্ষার্থীকে ডাক্তার হবার জন্য পাঁচ বছর কঠোর পরিশ্রম করতে হয়'। Which one is the correct English translation ?

A An entrant will be working hard for five years to be a physician. B An entrant will have been working hard for five years to make him a physician. C An entrant will have to require to work hard for five years to become physician. D Five years hard working for an entrant will make him a physician.