A pulse with unpredictable pattern is termed as an <em />irregularly irregular pulse. This kind of pulse coincides with an irregularly irregular heart rhythm seen in those with severe arrhythmias such as 3rd degree AV block. In contrast, there is a pulse that is irregular but has a predictable pattern termed as regularly irregular.
The student is trying to see which substance (disinfectant 1, 2, 3, or the distilled water) can disinfect the most.
it is D on my point of veiw..
