L, M, N, O and P are five buses of different sizes. Two of them provide food on board, 3 are luxurious buses and 3 are air conditioned buses. One has capacity of less than 20 passengers, 2 have capacity between 20 to 40 passengers, 2 have capacity of more than 40 passengers. The buses having capacity of more than 40 passengers are air-conditioned but not luxurious. Bus N has capacity of less than 20 passengers and is luxurious. Buses L and O provide food. The buses which provide food are luxurious and ply between Delhi and Agra.

The buses which are only air conditioned are:

Correct option is C

• Buses L and O provide food, so the buses that do not provide food are the remaining buses: N, M, and P.
• N is mentioned as having less than 20 passengers and is luxurious (but does not provide food).so it cannot be only air-conditioned.
  
• M and P are likely to be the buses without food, as they are not explicitly mentioned as providing food.