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The potential energy diagram for a react...

The potential energy diagram for a reaction `X to Y` is given. A and C in the graph corresponding to

A

A `to` activation energy, C `to Delta H^(@)`

B

A `to` energy of reactants, C `to` energy of products

C

A `to Delta H^(@), C to` activation energy

D

A `to` activation energy, C `to` threshold energy

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A
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