Select the alternative which is the best substitute of the given phrase.
Without previous preparation.

Correct option is C

The correct one-word for the given group of words is extempore.
Explain the correct answer:
· Correct word: Extempore – Spoken or done without preparation.
· Hindi meaning: बिना तैयारी के, तत्क्षण किया गया
· Use in a sentence: She gave an impressive extempore speech at the competition.
Meanings of the other given options:
· (a) Casual: Done without much thought or planning.
· Hindi meaning: अनौपचारिक या सामान्य
· · (b) Unprepared: Not ready or planned in advance.
· Hindi meaning: तैयारी न किया हुआ
· · (d) Emergent: Arising unexpectedly or requiring immediate attention.
· Hindi meaning: उदीयमान या आकस्मिक