Respuesta :

Two sides are 7 and 10,

sum of two sides should be greater than third side in a triangle.

so 7+1>10 , 8>10 ( false)

7+2>10, 9>10 ( false)

7+3>10, 10>10 ( false)

7+4>10, 11>10 (true)

so the third side should be 4

Option D is correct