Q--Can black swan's formation type help spell longest word in Dictionary?
A--My step-by-step reasoning: Black swan's fly in a "V" formation. The longest word in the dictionary is pneumonoultramicroscopicsilicovolcanoconiosis.
So, the answer is yes.

Q--Did the Beatles write any music in the Disco genre?
A--My step-by-step reasoning: The Beatles were active from 1960 until 1969. Disco began to appear around 1972.
So, the answer is no.

Q--Did polio medicine save the life of polio vaccine creator?
A--My step-by-step reasoning: Jonas Salk developed the first polio vaccine. Jonas Salk died of a heart attack in 1995. Heart attacks are commonly treated with beta blockers.
So, the answer is no.

Q--Is Nine Inch Nails a good guest for students in earliest grade to take Iowa tests?
A--
My step-by-step reasoning: The Iowa test is administered to students in kindergarten through eighth grade. Nine Inch Nails is a heavy industrial rock band formed in 1988. Nine Inch Nails albums are stamped with the explicit warning label.
So, the answer is no.