Option C should be the correct answer . If in case government fails to do so than they have to provide some special facilities to the people.

NREGA (National Rural Employment Guarantee Act) is a social welfare scheme launched by the Government of India to provide guaranteed employment to the rural population of the country. Under this scheme, the government promises to provide 100 days of employment to every rural household in a financial year. If the government fails to provide the promised employment, the workers are entitled to receive an unemployment allowance.

Consequences of the government's failure to provide 100 days employment under NREGA are discussed below:

Unemployment Allowance will be given
If the government fails to provide 100 days of employment to a rural household, the workers are entitled to receive an unemployment allowance. The amount of the allowance depends on the state government's policy and varies from state to state. In some states, the allowance is equivalent to 50% of the daily wage rate under NREGA, while in others, it is fixed at a certain amount per day.

Penalty against Officer-in-charge
If the officer-in-charge of the NREGA programme fails to provide the promised employment, he/she can be penalized. The penalty may include a fine, suspension, or termination of service, depending on the severity of the non-compliance.

No Extra Benefit will be given
If the government fails to provide the promised employment, no extra benefit will be given to the workers. The workers will only be entitled to receive the unemployment allowance.

Foodgrains will be provided
If the government is unable to provide employment to the rural household, it may provide foodgrains instead. In such cases, the government provides 10 kg of foodgrains per person per month, up to a maximum of five persons per household. The foodgrains are provided at a subsidized rate of Rs. 2 per kg for wheat and Rs. 3 per kg for rice.

Conclusion:
In conclusion, it is important for the government to provide the promised employment under NREGA to ensure the welfare of the rural population. Non-compliance with the scheme's provisions can result in penalties for the officer-in-charge and the entitlement of the workers to receive an unemployment allowance.