Three blocks \( A, B \) and \( C \) of masses \( 4 \mathrm{~kg}, 2 \mathrm{~kg} \) and \( 1 \mat...

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Three blocks \( A, B \) and \( C \) of masses \( 4 \mathrm{~kg}, 2 \mathrm{~kg} \) and \( 1 \mathrm{~kg} \) respectively, are in contact on a frictionless surface, as shown in the figure. If a force of \( 14 \mathrm{~N} \) is applied on the \( 4 \mathrm{~kg} \) block, then the contact force between \( A \) and \( B \) is
(a) \( 2 \mathrm{~N} \)
(b) \( 6 \mathrm{~N} \)
(c) \( 8 \mathrm{~N} \)
(d) \( 18 \mathrm{~N} \)
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