Analogy - Verbal and Reasoning

Directions to SolveEach of the following questions has a group. Find out which one of the given alternatives will be another member of the group or of that class.
Q1:

Carpenter, Plumber, Electrician

A Doctor

B Blacksmith

C Professor

D Lawyer

ANS:B - Blacksmith

Explanation: Carpenter, Plumber, Electrician and Blacksmith are in same working category.