The number of steps in a flight generally should not be less than A. 2 B. 3 C. 5 D. No limit

The correct answer is B. 3.

The number of steps in a flight generally should not be less than 3. This is because a flight with only 2 steps is too steep and can be difficult to climb, especially for people with disabilities or mobility issues. A flight with 3 steps is the minimum number that is considered safe and accessible for most people.

Option A is incorrect because a flight with only 2 steps is too steep and can be difficult to climb. Option C is incorrect because a flight with 5 steps is not the minimum number that is considered safe and accessible for most people. Option D is incorrect because there is a limit to the number of steps in a flight.