In the following question, a part of the sentence (a word or phrase) has been highlighted in bold. Four different ways of writing the word or phrase have been given in the options (1), (2), (3), and (4). Find the correct replacement of the given bold word or phrase. If the given word or phrase is grammatically correct, then select option (5).

The awe-inspiring Himalayan mountain range is virtually inaccessible by road, rail or air and it took nature millions of years creating it.