In 85% of the population this artery is dominant. What is the single most appropriate option?

The key is E. Right coronary artery. [If the posterior discending artery is supplied by the circumflex

artery then it is left dominant and if posterior descending artery is supplied by the right coronary artery

then it is right dominant. As in 85% of population posterior descending artery is supplied by right

coronary artery it is called the dominant that is right coronary artery is dominant].