Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
I think it should be E. Combining if yz>0 and xyz>0 then x must be positive. from S2, either y and z have to be positive or both have 2 b -ve. In case y and z are +ve, then answer is yes. In case both are -ve then sum of y+z is -ve so the whole ans is also -ve . thus the ans is No. Thus v r getting seperate answ. it shld be E