a) Puranjana was not careful enough to not allow Kalakanya to attack him
b) The gates of the city were not properly closed and hence was attacked
c) The citizens of the city were not devotees
d) When old age attacks, all the gates of the body are blocked by so many diseases and one becomes really miserable
The correct answer is
d) When old age attacks, all the gates of the body are blocked by so many diseases and one becomes really miserable