Block \( A \) has no relative motion with respect to wedge fixed to the lift as shown in figure ...

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Block \( A \) has no relative motion with respect to wedge fixed to the lift as shown in figure during motion 1 or motion 2 . Then,
(a) work done by gravity on block \( A \) in motion 2 is less than in motion 1
(b) work done by normal reaction on block \( A \) in both the motions will be positive
(c) work done by force of friction in motion 1 may be positive
(d) work done by force of friction in motion 1 may be negative
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