Correct Answer:
D. D. None of these (Toba Kakar Range)
The Bolan Pass is a crucial mountain pass located in the Toba Kakar Range of Balochistan, Pakistan. It serves as a gateway between Sindh and Afghanistan. The Salt Range, Kirthar Range, and Karakoram Range are geographically distinct and not associated with the Bolan Pass, making option D the correct choice.