The literary device used in line 6 is an example of _______?

Read the extract and answer the question

My heart leaps up when I behold
A rainbow in the sky:
So was it when my life began,
So is it now that I am a man,
So be it when I shall grow
The child is father of the man

A. synecdoche
B. irony
C. paradox
D. hyperbole

Correct Answer:

Option C – paradox