answer (a)
since north pole is being taken away , magnetic flux in left to
right direction is decreasing. so, induced current will be to left,
counterclockwise direction from end opposite to motion of magnet(right).
answer (b)
clockwise from left side and out of the page in resistor, as on closing switch, magnetic field is produced in left direction.
answer (c)
flux due to straight wire is into the page inside loop according
to right hand thumb rule. so, current will be in anticlockwise
direction or towards left in resistor, to oppose this flux.
answer (d)
force on electrons is clearly towards bottom and on positive charges towards top.
considering the latter, F = qv x B
so, field is into the page according to converse of of vector product rule.