'One who possesses many talents'

One word substitute for the given word is?

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.
P: And the victims are likely to be the poorest of the poor as well as the very sources of water- rivers, wetlands and aquifers.
Q: In India, water conflicts are likely to worsen before they begin to be resolved.
R: Till then they pose a significant threat to economic growth, security and health of the ecosystem.
S: Water is radically altering and affecting political boundaries all over world, between as well as within countries.

In the following question, four words are given out of which one word is incorrectly spelt. Find the incorrectly spelt word.

In the following question, four words are given out of which one word is incorrectly spelt. Find the incorrectly spelt word.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
A speech or a presentation made without previous preparation.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
One who is new to a profession

Improve the bracketed part of the sentence.
I (didn't see) him since we met two years ago.

Improve the bracketed part of the sentence.
He jumped off the train while it (had been running).

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/Phrase.
Red letter day