If a piece of metal was thought to be magnet, which one of the following observations would offer conclusive evidence?

Which one of the following brings about evidence for convergent evolution ?

Which one of the following Indus Civilization site gives evidence of a dockyard ?

In which of the following reaction, a visible change would be observed?

Which of the following atom would be rappled by magnetic filed ?

Which of the following animals casts skin in one piece ?

Which of the following animals casts skin in one piece ?

Which of the following would be attracted towards magnetic field

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confimatory evidence?