Step 1: Understanding the question.
This question asks about the primary reason for male migration in India. According to studies and demographic surveys, employment opportunities are the major factor driving male migration.
Step 2: Analyzing the options.
(A) शिक्षा: While education does influence migration, it is not the primary reason.
(B) रोजगार: Correct — Employment is the most common reason for male migration, as people often move for better job opportunities.
(C) व्यावसाय: Business migration is less common than migration for employment.
(D) इनमें से सभी: Although all these factors can contribute, employment is the most significant one.
Step 3: Conclusion.
The correct answer is (B) रोजगार, as it is the leading cause of male migration in India.