Which of the following statements is false?

a) The HasValue property returns true if a nullable-type variable contains a value;
otherwise, it returns false.
b) The Value property returns the nullable-type variable’s underlying value.
c) The null coalescing operator (??) has two operands. If the left operand is not null, the entire ?? expression evaluates to the left operand’s value; otherwise, it evaluates to the right operand’s value.
d) All of the above statements are true.

d) All of the above statements are true.