Answer:
6 is the degree of polynomial.
Explanation:
The given polynomial is

In this polynomial we have to tell its degree.
First we will calculate the degree of each term of the polynomial given.
3xy²z = Degree is 4 ( x-1, y-2,z-1 total 1 + 2 + 1 = 4)
= Degree is 5 (z - 5)
= Degree is 6 (y -2, z-4 total 2 + 4 = 6)
Therefore the highest degree of the polynomial will be the degree of polynomial.
Answer is Option 4. Degree - 6