Find out the correct parts of speech of underlined words in the following sentences.
a. All is now lost.
b. All men are mortal.
c. He spilled coffee all over himself.
d. They all live together in the same house.

The correct answer is Option A (a - Noun, b - Adjective, c - Adverb, d - Pronoun).

Key Points:
• Concept: Identification of Parts of Speech according to contextual usage.
• Explanation:
• a. All is now lost: 'All' stands for everything (used as a Noun/Indefinite Pronoun concept; MPSC key classifies 'a' as Noun).
• b. All men are mortal: 'All' modifies the noun 'men', so it functions as an Adjective (Determiner).
• c. He spilled coffee all over himself: 'All' modifies the prepositional phrase 'over himself', functioning as an Adverb.
• d. They all live together...: 'All' refers to the subject 'They', functioning as a Pronoun (appositive pronoun).
• Official Key: Option 1 (a - Noun, b - Adjective, c - Adverb, d - Pronoun) is the officially declared answer.
• Key Takeaway: Remember: Words like 'All' change their part of speech based on their structural role in a sentence.