Tell whether the given polynomial is a monomial, binomial, trinomial or none of these. Then state the degree and the coefficients of the polynomial.

$5c^{2}d$

Tell whether the given polynomial is a monomial, binomial, trinomial or none of these. Then state the degree and the coefficients of the polynomial.

$12x^2+d$

Tell whether the given polynomial is a monomial, binomial, trinomial or none of these. Then state the degree and the coefficients of the polynomial.

$15m^2-2p+5$

Tell whether the given polynomial is a monomial, binomial, trinomial or none of these. Then state the degree and the coefficients of the polynomial.

$8x-5x^2+11x^3$

Tell whether the given polynomial is a monomial, binomial, trinomial or none of these. Then state the degree and the coefficients of the polynomial.

$12abc-8a^2{b}^2{c}^2$

Tell whether the given polynomial is a monomial, binomial, trinomial or none of these. Then state the degree and the coefficients of the polynomial.

$-7a^3+5a^{2}b-a{b}^2+10b^3$

The polynomial $4x+x^2-8$ arranged in order of decreasing degree in $x$ will be:

.$A: x^2+4x-8$

$B: -8+4x+x^2$

Write the correct option (alphabet only) as the answer.$$

The polynomial $8x^2-3x^4-12+6x^3$ arranged in order of decreasing degree will be:

.$A: -3x^4+6x^3+8x^2-12$

$B: -12+8x^2+6x^3-3x^4$

Write the correct option (alphabet only) as the answer.

When the polynomial $x^{2}y-3y^3+4x^3-2x{y}^2$ is arranged in order of decreasing degree in $x$, we get $4x^3+a{x}^m{y}^n+b{x}^n{y}^m-3y^3$. Find the value of $a+b+m+n$.