The sides of a triangle are 3 cm, 4 cm and (x +1) cm, where x is an integer. Then, x can take the value/values :

Correct option is C

The sides of a triangle must satisfy the Triangle Inequality, which states that the sum of any two sides of a triangle must be greater than the third side.
In this case, we have: 3 + 4 > x + 1
7 > x + 1
x 6