Match the following safety arrangements for a surface-to-underground shaft hoist with their corresponding safety functions.
| Hoisting safety arrangement | Safety function |
|---|---|
| P Detaching hook | 1 Over-winding safety on surface |
| Q Narrowing rigid guides | 2 Resting cages |
| R Keps | 3 Over-winding safety at underground |
(A) P - 1, Q - 2, R - 3
(B) P - 3, Q - 1, R - 2
(C) P - 2, Q - 3, R - 1
(D) P - 1, Q - 3, R - 2
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