Let's align these components with their correct tests:
- (A) Flexibility is best measured by the Sit and Reach Test, used to assess the range of motion in joints, particularly the lower back and hamstrings.
- (B) Endurance can be gauged using the 600m Run/Walk, a test measuring cardiovascular endurance and stamina over a moderate distance.
- (C) Abdominal strength is specifically evaluated by the Partial Curl-up, which tests the strength and endurance of the abdominal muscles.
- (D) Speed is effectively tested through the 50m Dash (Standing Start), a short burst run to measure the speed and acceleration of an individual.
Matching the given components with their relevant tests:
- (A)-(III), Flexibility - Sit and Reach Test
- (B)-(I), Endurance - 600m Run/Walk
- (C)-(II), Abdominal strength - Partial Curl-up
- (D)-(IV), Speed - 50m Dash (Standing Start)
Thus, the correct answer is: (A)-(III), (B)-(I), (C)-(II), (D)-(IV)