Each of the following idioms is followed by some alternative meaning. choose the one which best expresses its meaning : By the rule of thumb
A
By the use of force
B
By practical experience which is rather rough
C
By cheating and deception
D
By the use of trickery
Correct Answer: By practical experience which is rather rough
The rule of thumb - অভিজ্ঞতা ও অনুশীলনের পর প্রতিষ্ঠীত পদ্ধতি বা প্রক্রিয়া, যা হল practical experience এর সাথে সঙ্গতিপূর্ণ। তাই সঠিক উত্তর option(b).