The correct option is D both a and b are correct
Meninges refer to the membranous coverings of the brain and spinal cord. Inflammation of meninges leads to a condition called meningitis. Symptoms may range from vomiting and headache to stiffness of neck. It can be caused by Neisseria meningitidis and Haemophilus influenzae.
Clostridium botulinum is known to cause botulism.