Given,
The statemenets are:
I. A root of a negative number may be a real number.
II. The positive square root of a number is smaller than the number.
III. A binomial multiplied by a binomial yields a trinomial.
For statement I:
Root of negative cannot be negative.
for statemenet II:
Yes, the square root of positive number is less than number.
But square root of fraction is greater than number.
For statement III:
A binomial multiplied by a binomial doesnot yields a trinomial
Hence, option d is correct.