In each of the following questions, four sentences have been given containing errors. Find out which of the following sentences, if any, is error-free. If all the given sentences have errors, then choose “All are incorrect”.

The correct sentence is: "The pandemic took a toll on the lives and livelihoods of migrant workers."

Step-by-step grammatical analysis of all sentences:

1. "The Union Budget has provided data at direct subsidies and transfer payments."
Error: Incorrect preposition. The verb/noun combination "data on" or "data regarding" should be used instead of "data at".
Corrected Sentence: "The Union Budget has provided data on direct subsidies and transfer payments."

2. "The pandemic took a toll on the lives and livelihoods of migrant workers."
Analysis: This sentence is grammatically correct. The subject "The pandemic" correctly agrees with the past tense verb "took", and the idiom "took a toll on" is used appropriately with correct prepositions and plural nouns.

3. "This female artist’s versatility were never under doubt."
Error: Subject-verb agreement error. The singular subject noun "versatility" requires a singular auxiliary verb ("was"), not the plural verb ("were").
Corrected Sentence: "This female artist’s versatility was never under doubt."

4. "There was a sense of disquiet among the children when I told him a horror story."
Error: Pronoun antecedent agreement error. The antecedent "children" is plural, so the corresponding object pronoun should be "them" instead of the singular "him".
Corrected Sentence: "There was a sense of disquiet among the children when I told them a horror story."

Therefore, the only error-free sentence is the second option.