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Option 3 : 2013–2014

In year 2013–2014, difference of passed and failed students = 150 – 100 = 50

In year 2014–2015, difference of passed and failed students = 200 – 100 = 100

In year 2015– 2016, difference of passed and failed students = 300 – 50 = 250

In year 2016–2017, difference of passed and failed students = 250 – 100 = 150

In year 2017–2018, difference of passed and failed students = 300 – 100 = 200

∴ In the year 2013–2014 the difference between the number of students passed and failed students is the lowest
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