Degree of a polynomial is the greatest power or the greatest exponent . For e.g
![2x^3 +3x^2 +4x +1](https://img.qammunity.org/2019/formulas/mathematics/middle-school/yanl2ptirsb6exzilvj14ox1dk88a238dn.png)
For the above polynominal, the greatest exponent is 3. So the degree is 3 .
Let's check out the question .
![4x^3+3x^2+6x+5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ge82ef18mghnsmdndfeyjemkc0zaeq7lut.png)
Here the greatest exponent is 3. SO the degree is 3 and the correct option is B