Answer
(d) you can't tell the relative emf magnitudes from the data given
Work Step by Step
The induced emf is given by :-
$E=-N\frac{\Delta flux}{\Delta t}$,
From the given information maybe we can get an idea of change in flux and the time taken, but we also need N or number of loops of the respective loops A and B to tell the relative emf magnitudes. So, one can't tell the relative emf magnitudes from the data given.
