The correct answer is: Only conclusion I follows.
The statement says that a large majority of the work force in India is unorganised. Most of them earn either the minimum or uncertain wages while others are engaged in sundry jobs. This does not mean that all workers in the unorganised sector have a regular and fixed income. It is possible that some workers in the unorganised sector have a regular and fixed income, but this is not a necessary conclusion from the statement. The statement only says that most workers in the unorganised sector earn either the minimum or uncertain wages. It is possible that the remaining few workers in the unorganised sector have a regular and fixed income, but this is not something that can be concluded from the statement.
Conclusion I, on the other hand, does follow from the statement. The statement says that a large majority of the work force in India is unorganised. Most of them earn either the minimum or uncertain wages while others are engaged in sundry jobs. This means that most workers in India do not have the benefits that are available to workers in the organised sector. This includes better facilities and the ability to stay longer in their jobs. Therefore, conclusion I follows from the statement.
Conclusion II does not follow from the statement. The statement says that a large majority of the work force in India is unorganised. Most of them earn either the minimum or uncertain wages while others are engaged in sundry jobs. This does not mean that some workers in the unorganised sector have a regular and fixed income. It is possible that some workers in the unorganised sector have a regular and fixed income, but this is not a necessary conclusion from the statement. The statement only says that most workers in the unorganised sector earn either the minimum or uncertain wages. It is possible that the remaining few workers in the unorganised sector have a regular and fixed income, but this is not something that can be concluded from the statement.