Question

Which of the following propositions is true?
b» — də = b = d
by d~ = (b~-d)
~(p— q) =[-(P-9) ^~(9-)]
O o
O ~(~p~~q) = -png
The contranocitiyoofy​

Answer 1

Answer:

vo bhi nhi hai na to gf ko bhi nhi hai na to