In the figure \( m_{A}=m_{B}=m_{C}=60 \mathrm{~kg} \). The coefficient of friction between \( C ...

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In the figure \( m_{A}=m_{B}=m_{C}=60 \mathrm{~kg} \). The coefficient of friction between \( C \) and ground is \( 0.5, B \) and ground is \( 0.3, A \) and \( B \) is 0.4 . \( C \) is pulling the string with the maximum possible force without moving. Then the tension in the string connected to \( A \) will be
(a) \( 120 \mathrm{~N} \)
(b) \( 60 \mathrm{~N} \)
(c) \( 100 \mathrm{~N} \)
(d) Zero
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