The correct answer is: No error.
The sentence is grammatically correct. The word “a” is used before a singular noun, and the word “detailed” is an adjective that describes the noun “inquiry.” The word “in” is used to indicate a location, and the word “incident” is a noun that refers to an event. The word “has” is the present tense form of the verb “to have,” and the word “been” is the past participle of the verb “to be.” The word “initiated” is the past participle of the verb “to initiate,” and the word “by” is used to indicate the agent of an action. The word “the” is used before a noun to indicate that it is specific. The word “Central” is an adjective that describes the noun “Government.” The word “Government” is a noun that refers to the governing body of a country.
The sentence can be rewritten as follows:
The Central Government has initiated a detailed inquiry into the incident.