Who used the technique of mixing colors in oil
and applying the paint to a wood panel to create
the painting shown here?

a. jan van eyck

b. hans holbein, the elder

c. cosimo de' medici

d. leonardo da vinci

I think it is A you do not have the painting  

Explanation:

What techniques did Jan van Eyck use in his paintings?

In fact painting with oil dates as far back as the Indian and Chinese painters of the fifth century however Van Eyck was one of the earliest masters of the technique. His use of oil paints in his detailed panel paintings, typical of the Netherlandish style, resulted in him being known as the father of oil painting

it further strained relations between the north and the south and convinced

the answer would be c