Correct Answer - Option 4 : 4 - 3 - 2 - 1 - 5
The logical and meaningful order can be increasing or decreasing order.
From option it is clear that we have to do in increasing order because each option has 4 at first which is Mili Gram (smallest)
Mili Gram < Gram < Kilo Gram < Quintal < Ton
Hence, correct order is 4 - 3 - 2 - 1 - 5