The ratio of the side of the triangle is 2:√6:1+√3.Find the ratio of the measure of the angle

Answer is d) 3:4:5 as simply apply cos rule then u will get that ........................................ cosA=[6+2√3]/[2√6+6√2] = 1/√2= A=45°cosB=[2+2√3]/[4+4√3] = 1/2= B=60° so therefore C=75° then ratio is 45:60:75 and further in simplest form 3:4:5