Step 1 : Introduction to the question "Which alcohol spirit goes into a traditional Tom Collins?"
...To make this favorite summer sipper, you'll need carbonated water, lemon juice, sugar and gin. A Tom Collins is properly served in a Collins glass over ice. The name for this popular drink came out of a circulating hoax/joke popular in the mid-1870s. The drink came about when Jerry Thomas, the "father of American mixology," included the recipe for a Tom Collins in his book "The Bartender's Guide." It became one of the most often requested drinks during 1878 and its popularity continues today. Source: GinWisdom.com
Step 2 : Answer to the question "Which alcohol spirit goes into a traditional Tom Collins?"
Please let us know as comment, if the answer is not correct!