Select the correct indirect form of the given sentence.
He said to me, “I am going to France next week.”

Correct option is D

The correct indirect form is (d) "He told me that he was going to France the following week." This maintains the correct tense and pronoun shift from direct to indirect speech.
Rules for converting direct speech to indirect speech-
· When the reporting verb of direct speech is in past tense then all the present tenses are changed to the corresponding past tense in indirect speech. 
· Reporting verbs such as ‘said/ said to’ changes to said, told.
· Comma inverted comma will be replaced with conjunction “That”.
· The  first person in direct speech  changes as per the subject of the speech.
· The  second person of direct speech  changes as per the object of reporting speech.
· The  third person of direct speech  doesn’t change.
· “Next week” changes to “the following week”