In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/ phrase. rule of thumb

Options

A. a rough unit of measure for small lengths
B. a broadly accurate guide based on practice
C. to force someone to work against his wish
D. to use your power to ensure discipline

Answer

B

Explanation

rule of thumb: a broadly accurate guide or principle, based on practice rather than theory.
• A good rule of thumb is that a portion of rice is two handfuls.