Which statement describes magnetic field lines at the north and south pole of a bar magnet?

a. field lines begin near the magnet's south pole and extend toward its north pole
b. field lines begin near both the magnet's north and south poles and meet in the middle
c. field lines begin near the center of the magnet and extend toward the north and south poles
d. field lines begin near the megnet's north pole and extend toward it's south pole

A "bar magnet" has a north and south pole associated with it. In this case the correct answer is D - the magnetic field lines start at the magnet's north pole and then extends down to the south pole of the magnet. Bar magnets are made from materials that are ferromagnetic and have an intrinsic magnetisation even in the absence of a magnetic field. 

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium