The correct option is A a - (iv), b - (v), c - (i), d - (ii)
Yersinia pestis is a Gram-negative, rod-shaped coccobacillus, a facultative anaerobic bacterium that can infect humans and animals. It causes the deadly disease named plague. Human Y. pestis infection takes three main forms: pneumonic, septicemic, and bubonic plagues. All three forms were responsible for a number of high-mortality epidemics throughout human history.
Whooping cough (pertussis) is caused by the bacterium Bordetella pertussis. B. pertussis is a very small Gram-negative aerobic coccobacillus that appears singly or in pairs. Its metabolism is respiratory, never fermentative, and taxonomically, Bordetella is placed among the "Gram-negative Aerobic Rods and Cocci.
Measles, also known as morbilli, rubeola, or red measles, is a highly contagious infection caused by the measles virus. Initial signs and symptoms typically include fever, often greater than 40 C (104.0 F), cough, runny nose, and red eyes.
Wuchereria bancrofti is a human parasitic roundworm that is the major cause of lymphatic filariasis. It is one of the three parasitic worms, besides Brugia malayi and B. timori, that infect lymphatic system to cause lymphatic filariasis. These filarial worms are spread by a mosquito vector. Lymphatic filariasis (elephantiasis) is a parasitic disease caused by thread-like worms called Wuchereria bancrofti.