Final answer:
The 2015 Teen Choice Award for Best TV Kiss was won by Nina Dobrev and Ian Somerhalder from The Vampire Diaries.
Step-by-step explanation:
The correct answer is a) Nina Dobrev & Ian Somerhalder, The Vampire Diaries. They won the 2015 Teen Choice Award for Best TV Kiss. The Teen Choice Awards is an annual awards show that honors the biggest achievements in music, film, television, sports, and fashion, voted by teenage viewers. In this particular category, The Vampire Diaries' stars Nina Dobrev and Ian Somerhalder won for their on-screen chemistry and memorable kiss.