If A and B are square martrices of equal degree, then which one is correct among the following?

Select the correct optons from the given alternatives:If A and B are square matrices of equal order,then which one is correct among the following?

Which one among the following is correct?

Which one among the following is not correct?

If the circumference of a circle is equal to the perimeter of square, then which one of the following is correct ?

Which one of the following is correct among the following sets of quantum number-

If b is the largest square divisor of c and a then which one of the following is correct? (where a,b and c are intigers)

If the sum of the roots of ax^(2) + bx + c = 0 is equal to the sum of the squares of their reciprocals, then which one of the following relations is correct?