Which sentence is incorrect? 

The question is asking which sentence is incorrect out of four options. Out of the four sentences, three are correct and one is incorrect. The correct sentences are "Nasima had her nails done", "I had my horse carry the luggage", and "I made him say sorry". However, the sentence "Let's get our car fix" is incorrect because it is missing the word "fixed". The correct sentence would be "Let's get our car fixed".