Q: On BBC World News channel last night they showed an informative program about new innovations in medical imaging, which you would have found interesting.

• 1
  there was an informative program about innovations in medical imaging, a program you would have found interesting.
• 2
  they showed an informative program about innovations in medical imaging, which you would have found interesting.
• 3
  there was an informative program about new innovations in medical imaging, that you would have found interesting.
• 4
  they showed an informative program about new innovations in medical imaging, which you would have found interesting.