The phrase "a third choice to" is correct and usable in written English.
It can be used when presenting an additional option or alternative in a discussion or decision-making context.
Example: "In addition to the two options we discussed, I would like to propose a third choice to consider."
Alternatives: "an additional option for" or "a third alternative for".
Some may be waiting for a third choice to emerge, an honorable if improbable idea, but too many seem hobbled by a disdain rooted less in rationality than in pure habit to see the reality of the circumstance.
Mr. Musharraf hopes that his political party will be able to offer a third choice to voters, many of whom are disillusioned by the Pakistan Peoples Party, led by President Asif Ali Zardari, and the Pakistan Muslim League-Nawaz, which is led by former Prime Minister Imran Khan, a cricket star turned politician, is gaining traction as an alternative to the main parties, analysts say.
In the LA Times, Carla Hall counters: "Although a fashion editor doesn't leap to mind as a first choice to be ambassador to the Court of St James, does an investment banker?
When David Moyes appeared to state that Rooney was a second choice to Robin van Persie during United's pre-season tour this was seized upon by the forward's camp, who let it be known he was "angry and confused".
The former Red Bull Salzburg goalkeeper has been a fringe player since he joined the Swans in 2011, filling in as a second choice to Michel Vorm before Fabianski moved to the Liberty Stadium in May.
Had Derby accepted a bid from Manchester United, Poom said he could have followed in his hero's footsteps: "(United) were looking for a second choice to compete with (Fabien) Barthez.
Thus, NSAIDs are a second choice to acetaminophen, recommended only when the pain is not handled by the latter.
Barry Callebaut, a global supplier of cocoa products, has invented a whole new type of chocolate adding a fourth choice to the current line up of dark, milk and white varieties.
In fact, CT and MRI are proposed as a first choice to study location and extension of GIST in the guidelines.
A third choice is to raise taxes.
Now there is a third choice: go to jail.
