Step 1: Understanding the question.
Citroen is a car manufacturer that does not yet have a manufacturing facility in India, while the other manufacturers (Nissan, Renault, and Skoda) have established manufacturing units in India.
Step 2: Analysis of options.
- (A) Nissan: Nissan has a manufacturing facility in India.
- (B) Citroen: This is the correct answer. Citroen does not have a manufacturing unit in India.
- (C) Renault: Renault operates a manufacturing facility in India.
- (D) Skoda: Skoda also has manufacturing facilities in India.
Step 3: Conclusion.
Thus, the correct answer is (B) Citroen.