In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.
One who perpetually hesitates(A)/which of the two things he will do first(B)/will ultimately do neither.(C)No error(D)
In the following question, sentence given with blank is to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
Unchecked industrial effluents discharging into the rivers has caused ______________ damage to the environment.