Answer:
B-
Explanation:
Given equation : square root of 56 − the square root of 14 + the square root of 126 or

Solution of the equation :

=
=

=

=14.966
Now,
- square root of 14 =√14 =3.741
- 4 the square root of 14 = 4√14 = 14.966
- 2 the square root of 42= 2√42 = 12.961
- 8 the square root of 42 = 8√42= 51.845
Therefore, Option B is correct