RBI Assistant Model Paper 6

From the given statement, we can infer that it will be filled in with the word which can symbolize using the lessons of past for improving the domestic conditions. Here, 'tweaking' is the most suitable word to fill in the blank to make the statement grammatically correct and contextually meaningful. Hence, option (b) is the most suitable answer choice.
Tweaking : improve (a mechanism or system) by making fine adjustments to it.
Ruling : exercise ultimate power or authority over.
Startling : cause to feel sudden shock or alarm.
Struggling : make forceful or violent efforts to get free of restraint or constriction.