- AStatement I alone is sufficient but Statement II alone is not
- BEither statement alone is sufficient
- CStatement II alone is sufficient but Statement I alone is not
- DBoth statements together are needed (neither alone is sufficient)
Step-by-Step Solution
From I, C = 20 + 5 = 25, so I alone works. From II, C + D = 45 but D is unknown, so II alone cannot fix C.
Answer: A) Statement I alone is sufficient but Statement II alone is not