Since the only person left is Grover, he must be the eldest.
Read the following cartoon carefully.

Study the following question carefully and choose the right answer.
Statement: Should articles of only deserving authors be allowed to be published?
Arguments: \[\begin{array}{|c|l|}\hline (I) & \text{No, it is not possible to draw a line between the deserving and the undeserving.} \\ \hline (II) & \text{Yes, it will save a lot of paper which is already in short supply.} \\ \hline \end{array}\]

Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?