​In which of the following years was the first edition of the Indian Super League (ISL) held?​

Correct option is C

The correct answer is (C) 2014.

• The ISL is India's top-tier professional football league. 
• It features a regular season, playoffs, and a final to determine the champion. 
• The league is co-promoted by Reliance and Star India and supported by the All India Football Federation (AIFF). 
• The inaugural season began on 12 October 2014 at the Salt Lake Stadium when Atlético de Kolkata defeated Mumbai City, 3–0.
• The first goal was scored by Fikru Teferra.
• The first Indian to score in the league was Balwant Singh for Chennaiyin FC.