Answer:
Paper Burning
Step-by-step explanation:
The value of the rate constant K shows the extent to which a reaction tends to go towards completion. It shows how fast a reaction occurs. An incredibly large value of K indicates a reaction that proceeds to completion quickly while a small value if K indicates a reaction that proceeds very slowly e.g conversion of diamond to graphite.
Burning of paper is the most spontaneous of all the reactions shown above and it tends to move towards completion faster than any other reaction listed among the options.