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Two blocks of mass \( m=5 \mathrm{~kg} \) and \( M=10 \mathrm{~kg} \) are connected by a string passing over a pulley \( B \) as shown. Another string connects the centre of pulley \( B \) to the floor and passes over another pulley \( A \) as shown. An upward force \( F \) is applied at the centre of pulley \( A \). Both the pulleys are massless. The accelerations of blocks \( m \) and \( M \), if \( F \) is \( 300 \mathrm{~N} \) are (Take, \( g=10 \mathrm{~m} / \mathrm{s}^{2} \) )
(a) \( 5 \mathrm{~m} / \mathrm{s}^{2} \), zero
(b) zero, \( 5 \mathrm{~m} / \mathrm{s}^{2} \)
(c) zero, zero
(d) \( 5 \mathrm{~m} / \mathrm{s}^{2}, 5 \mathrm{~m} / \mathrm{s}^{2} \)
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