Question

Mycoplasma causes 'X' disease in plants and 'Y' disease in cattle. 'X' and 'Y' diseases serially are

• A. 'X' Sleeping sickness and 'Y' mad cow disease
• B. 'X' Witches broom and 'Y' Pleuropneumonia
• C. 'X' Witches broom and 'Y' Mycoplasmal urethritis
• D. 'X' Scrapie and 'Y' Potato spindle tuber

Hint:

Remember: Mycoplasma (mollicutes) cause a range of host-specific diseases — in plants often "witches' broom" symptoms; in cattle, Mycoplasma-related pleuropneumonia is a key disease to recall.
Link the organism group (mollicutes/mycoplasmas) to symptomatic keywords (broom-like proliferation in plants; pleuropneumonia in cattle).
When options include a plant disease + an animal disease, match by typical host-pathogen associations.

Answer 1

The Correct Option is B

Mollicutes (mycoplasma-like organisms) and some \emph{Mycoplasma} spp. are associated with plant diseases exhibiting proliferative symptoms such as "witches' broom" (for example in some woody plants and palms). In animals, \emph{Mycoplasma} species can cause respiratory diseases; a classical cattle disease associated with \emph{Mycoplasma} is contagious bovine pleuropneumonia (CBPP) or related pleuropneumonias. Therefore X = Witches broom (plant disease) and Y = Pleuropneumonia (cattle respiratory disease) — option (2).