A
4 3 2 1
B
4 1 2 3
C
2 3 4 1
D
1 3 4 2
Correct answer: (a) 4 3 2 1
Explanation
- A
4 3 2 1
(a) 4 3 2 1. Atlas–Morocco (4), Kilimanjaro–Tanzania (3), Chimborazo–Ecuador (2), Pyrenees–France/Spain (1). That code is the official key.
- B
4 1 2 3
(b) 4 1 2 3. It gives Kilimanjaro to France/Spain and the Pyrenees to Tanzania.
- C
2 3 4 1
(c) 2 3 4 1. It opens the Atlas in Ecuador.
- D
1 3 4 2
(d) 1 3 4 2. It puts the Atlas in France/Spain and Chimborazo in Morocco.
Summary. Official key is (a) 4 3 2 1. Atlas in Morocco, Kilimanjaro in Tanzania, Chimborazo in Ecuador, Pyrenees on the France–Spain border.