According to given sentence, the sentence contains an indirect object is option A: The doctors will give Charlie an operation.
What do you mean by Indirect Object?
An indirect object is defined as the object or the word that is helpful to gain the direct object. This is the opposite side of direct object.
On the other hand, the direct object is refers to as the object that collect the action create by verb.
According to given sentence, " the doctor will give Charlie an operation" here the word Charlie is considered as the indirect object and operation is a direct object and the doctor who give it to the Charlie.
The process starts when the action of particular sentence is moves from the subject with the help of verb, to firstly direct object and then to indirect object.
In other options like option B, C and D there was no indirect object is given as these include only direct objects.
Therefore, correct option is A.
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