
- Legionellosis (A): This is a bacterial disease caused by {Legionella} species, primarily {Legionella pneumophila}, which are waterborne pathogens.
- Giardiasis (B): This disease is caused by {Giardia lamblia}, a protist that infects the gastrointestinal tract through contaminated water or food. 
Other options: - Typhoid fever (C): Typhoid fever is caused by the bacterium {Salmonella Typhi}, not a virus. 
- Listeriosis (D): Listeriosis is caused by the bacterium {Listeria monocytogenes}, not a fungus.
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?
 
The \( F_{121} \) value of a known microorganism with \( Z \) value of \( 11^\circ C \) is 2.4 min for 99.9999% inactivation. For a 12D inactivation of the said microorganism at \( 143^\circ C \), the \( F \) value (in min) is .......... (rounded off to 3 decimal places)
Three villages P, Q, and R are located in such a way that the distance PQ = 13 km, QR = 14 km, and RP = 15 km, as shown in the figure. A straight road joins Q and R. It is proposed to connect P to this road QR by constructing another road. What is the minimum possible length (in km) of this connecting road?
Note: The figure shown is representative.
