Which natural calamity is the heroic deed related to?
The correct answer for the question is Option B, “floods.”
The passage here describes about the heavy floods that took place In Mumbai, a decade ago. There is plenty of evidence to prove that the calamity which occurred was a flood, mentioned in option B. Some of them are the heavy amount of water logging and the then the incident described which have children stuck inside an apartment, under water.
The other options A, C and D are not calamities but only events arising out of the same, and hence are not the answers.