Read the given extract and answer the questions that follow :
For he seemed to me again like a king,
Like a king in exile, uncrowned in the underworld,
Now due to be crowned again. And so, I missed my chance with one of the lords Of life.
And I have something to expiate:
A pettiness.
(a) Why is the snake called a king in exile ?
(b) What is the pettiness referred to in these lines ?
(c) What does the word ‘underworld’ mean ?
(d) The poet refers to ...... as one of the lords of life