Matching Pathogens and Transmission Modes for Cholera and Measles

Steps:

• Identify cholera pathogen as bacterium (row 1) and transmission as waterborne/fecal-oral (mode X).
• Identify measles pathogen as virus (row 3) and transmission as airborne/droplet (mode Y).
• Match cholera to "1 and X" and measles to "3 and Y".
• Select option pairing these matches.

Why A is correct:

• A correctly pairs cholera's bacterial pathogen (1) with waterborne transmission (X) and measles' viral pathogen (3) with airborne transmission (Y), per standard epidemiology definitions.

Why the others are wrong:

• B mismatches cholera's transmission as airborne (Y) instead of waterborne.
• C reverses pathogens and assigns contact transmission (Z) to both, ignoring specifics.
• D assigns waterborne (X) to measles and contact (Z) to cholera, swapping modes incorrectly.

Final answer: A