Identify the Gram Negative Rods (non-enteric):

Haemophilus influenzae is the correct answer because it is a Gram-negative rod bacterium that is non-enteric. Haemophilus influenzae is known to cause various infections such as respiratory tract infections, bacteremia, and meningitis.

The other options can be explained as follows:

• Enterobacter cloacae (Option A) is a Gram-negative rod bacterium that falls under the Enterobacteriaceae family, making it enteric.
• Listeria monocytogenes (Option C) is a Gram-positive rod bacterium and is therefore not a Gram-negative rod.
• Propionibacterium acnes (Option D) is a Gram-positive rod bacterium commonly associated with acne, and it is not a Gram-negative rod.