Which of the following could be the sides of a triangle

If the two smaller numbers equal the biggest number, it can't be a triangle. The two sides have to be bigger than the bigger side
a) 6 cm, 6 cm , 12cm              6 + 6 = 12.          N0 TRIANGLE
b) 19 cm, 27 cm, 10cm.          19 + 10 = 29        YESS TRIANGLE
c) 3cm, 7cm, 19cm                 3 + 7 = 10             N0 TRIANGLE
d) 20ft, 10ft, 5ft                       10 + 5 = 15         N0 TRIANGLE

THE ANSWER IS B

The answer of the second problem is B) 29cm since 10 + 17 = 27 and it has to be a bigger number

I’m not sure about that