Which among the following is / are correct statements:
1. A sail boat can be propelled by air blown at the sail from a big fan attached to the boat
2. All type of waves exhibit diffraction
3. Potatoes, maize, barley, rice can be used for commercial production of Ethanol
Select the correct option from the codes given below:

Answer: [B] Only 2 & 3

The first statement is not correct because the action of the air from the fan and reaction of the sail both would act on the boat itself.

This question is a part of GKToday's Integrated IAS General Studies Module