| 1 | A | B | C | D |
| --- | --- | --- | --- | --- |
| 2 | Behzad Leito - As Lead Artist |  |  |  |
| 3 | Title | Year | Featured Artist(s) | Album |
| 4 | "Adam Fazaee" | 2011 | Khashayar | N/A |
| 5 | "Kargardan" | 2011 | Erfan | N/A |
| 6 | "Farda (Live Remix Tomorrow)" | 2011 | Laleh | N/A |
| 7 | "Touye Meh" | 2012 | Paya | N/A |
| 8 | "Fogholade" | 2012 | Sijal and Sami Beigi | E MA II The Second |
| 9 | "Naab" | 2013 | Alireza JJ and Sijal | Khakestari |
| 10 | "Sakht Migzare" | 2013 | Alireza JJ and Sijal | Khakestari |
| 11 | "Sargarmi" | 2014 | N/A | Khakestari |
| 12 | "Paropache" | 2014 | Sepehr Khalse | Sis |
| 13 | "Palang" | 2014 | Alireza JJ and Sijal | Khakestari |
| 14 | "Dadim Raft Toro" | 2015 | Sogand | N/A |
| 15 | "Khordad" | 2015 | Cornellaa & Dynatonic | Bistose |
| 16 | "Bahatam Dasham" | 2015 | Sijal | Bistose |
| 17 | "Khaak" | 2015 | Sijal and Nassim | Bistose |

Question: In which year was the single  "Khaak" featuring Sijal and Nassim released?
Answer: The single, "Khaak" featuring Sijal and Nassim, was released in 2015.