I think this is wrong. Statement I is insufficent too. Try with 4. 16-8+A can be positive even if A=-2,-3......
So the right answer should be E. Am I correct?
Is A positive?
1)x^2-2x+A is positive for all x
2) Ax^2+1 is positive for all x
Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
EACH statement ALONE is sufficient
Statements (1) and (2) TOGETHER are NOT sufficient
Statement (1) by itself is sufficient. . For this expression to be always positive has to be more than 0. has to be more than 1.
Statement (2) by itself is insufficient. is positive for all even if is 0.
The correct answer is A.