How do I get the parent's class name in Ruby

Let assume I have a classes A and B where B inherits A. How do I print parent class name in B

class A
end

class B < A
end

Some things I have tried:

>> B.new.class #=> B   #which is correct
>> B.new.parent  #=> Undefined method `parent`
>> B.parent   #=> Object
>> B.parent.class #=> Class

class A
end

class B < A
end

B.superclass # => A
B.superclass.name # => "A"