Answer:
(A) Two acute angles add to an obtuse angle
It's sometimes because for example if you take two acute angles
one is 30 and other is 20
they add to 50 and not greater than 90 so it can be sometimes greater but not always
(B) Two adjacent angles make a line
Its also sometimes because a line means it should be 180 degrees so two adjacent angles can out always be equal to 180 that is a line
(C)Two obtuse angles are supplementary
It's Never true because obtuse angles start from 90 so if you take 91 also and other 91 too so if we add them up that will be 182 not 180
as we know 180 = supplementary angle that's why