A uniform magnetic field $B$ of $0.3\, T$ is along the positive $Z-$ direction . A rectangular loop $(abcd)$ of sides $10\, cm\times5\, cm$ carries a current $I$ of $12\, A$. Out of the following different orientations which one corresponds to stable equilibrium ?
JEE MAIN 2017, Diffcult
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Magnetic moment of current carrying rectangular loop of area $\mathrm{A}$ is given by $\mathrm{M}=$ $N I A$
magnetic moment of current carrying coil is a vector and its direction is given by right hand thumbrule, for rectangular loop, $\overrightarrow{B}$ at centre due to current in loop and $\overrightarrow{\mathrm{M}}$ are always parallel.
Hence, $(c)$ corresponds to stable equilibrium. 
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