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# The physical quantity not having the same dimensions are

$\begin{array} {1 1}(a)\;torque \;and\;work\\(b)\;momentum\;and\;plank's\; constant\\ (c)\;stress\;and\;young's\;modulus \\(d)\;speed\;and (\mu_0 \in _0)^{\large\frac{-1}{2}}\end {array}$

Torque has same dimension as work, Stress has same dimensions as Young's modulus,Speed and $(\mu_0\;\in_0 )^{\large\frac{-1}{2}}$ have same dimensions
but Momentum and Plank's constant do not have same dimensions
Hence b is the correct answer.
edited Jan 9, 2014 by meena.p