Scurvy is a disease characterized by weakness, bleeding gums, loose teeth, and delayed wound healing. It is caused by the deficiency of Vitamin C (ascorbic acid).
Explanation of options:
- (A) Vitamin B: Deficiency causes beriberi, pellagra, or anemia (depending on type of B vitamin).
- (B) Vitamin C: Deficiency causes scurvy.
- (C) Vitamin D: Deficiency causes rickets in children and osteomalacia in adults.
- (D) Vitamin E: Deficiency causes muscular weakness and neurological problems.
Thus, the correct answer is Vitamin C.
\[
\boxed{\text{Vitamin C (Ascorbic acid)}}
\]