Which of the following statement(s) is/are correct? (a) Conservation of mechanical energy does n...

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Which of the following statement(s) is/are correct?
(a) Conservation of mechanical energy does not consider only conservative force.
(b) Conservation of energy consider both conservative and non-conservative forces.
(c) Conservation of energy consider only conservative force.
(d) Mass converted into energy in nuclear reaction is called mass-defect.
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