For the reaction, `2A+BrarrC` which relationship is correct?

Which statement/relationship is correct?

Which statement/relationship is correct ?

For the reaction, A+2BrarrC , the relative rate of reaction can be represented by

For the reaction , A+BrarrC+D . The variation of the concentration of the products is given by the curve:

For a reaction at constant pressure to be spontaneous, which relationship is correct