In the following question, a word has been used in sentences in THREE different ways. Choose the option corresponding to the sentences in which the usage of the word is CORRECT or APPROPRIATE. GATEWAY (i) The new highway will serve as a gateway for tourists visiting the city. (ii) He was looking for a gateway to increase his savings. (iii) The internet has become a gateway for accessing information quickly and efficiently. 

In sentence (i), 'gateway' is used correctly to mean an entrance or means of access to a location or opportunity. In sentence (ii), 'gateway' is incorrectly used, as it doesn't fit with the idea of increasing savings. Typically, 'gateway' refers to a literal or metaphorical means of entry to something, not an increase in money. In sentence (iii), 'gateway' is correctly used to refer to something that provides access or entry to something else, in this case, information via the internet.