In south of Spain, across the strait from Ceuta, were stationed Syrian troops from Damascus.

Explanation

"In south" is incorrect. The correct phrase should be "In the south" to indicate a specific region within Spain. There is an error here.The error in the sentence is the phrase "In south." It should be corrected to "In the south" to properly indicate the location within Spain. Thus, the correct option to mark the error is A) In south.