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A sample of an ideal gas is taken through the cyclic
\( \mathrm{P} \) process \( a b c a \) as shown in
\( \mathrm{W} \) the figure. The change in the internal energy of the gas along the path \( c a \) is -180 J. The gas absorbs \( 250 \mathrm{~J} \) of heat along the path \( a b \) and \( 60 \mathrm{~J} \) along the path \( b c \). The work done by the gas along the path \( a b c \) is
(a) \( 120 \mathrm{~J} \)
(b) \( 130 \mathrm{~J} \)
(c) \( 140 \mathrm{~J} \)
(d) \( 100 \mathrm{~J} \)
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