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A rectangular loop of sides \( 10 \mathrm{~cm} \) and \( 5 \mathrm{~cm} \) carrying a current \( \mathrm{I} \) of \( 12 \mathrm{~A} \) is placed in different orientations as shown in the figures below:
(a)
(b)
(c)
(d)
If there is a uniform magnetic field of \( 0.3 \mathrm{~T} \) in the positive \( \mathrm{z} \) direction, in which orientations the loop would be in (i) stable equilibrium and (ii) unstable equilibrium?
(A) (b) and (d), respectively
(B) (b) and (c), respectively
(C) (a) and (b), respectively
(D) (a) and (c), respectively
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