Can there be a time-temperature graph as follows? Justify your answer.

(i) As time increases, the temperature increases. This is a valid time temperature graph.

(ii) As time increases, the temperature decreases. This is a valid time temperature graph.

(iii) Graph shows the different temperatures at the same time, Which is not possible. This is not a valid time temperature graph.

(iv) As time increases, the temperature remains constant. This is a valid time temperature graph.