Casualization of workforce would result in:

The correct option is: Increase in the vulnerability of the workforce.

Step-by-Step Explanation:

1. Understanding Casualization of Workforce:
Casualization of workforce refers to a process where the proportion of casually hired workers in the total workforce increases over time. Unlike regular or permanent employees, casual workers are employed on a temporary, daily, or contract basis without any long-term commitment from the employers.

2. Analyzing the Impact on Job Security and Income:
Casual workers do not have regular jobs or guaranteed working hours. They are hired when work is available and laid off when demand falls. This leads to a direct loss of income stability and employment security.

3. Absence of Social Security Benefits:
Regular workers typically enjoy social security benefits such as paid leave, provident fund, medical insurance, gratuity, and pension. Casual workers are almost always excluded from these benefits, leaving them without any safety net during sickness, injury, or old age.

4. Resulting Vulnerability:
Because they lack job security, steady income, and social benefits, casual workers are highly vulnerable to economic shocks, market fluctuations, and exploitation by employers. Thus, the casualization of the workforce directly results in an increase in the vulnerability of the workforce.