Four words are given, out of which only one word is spelt correctly. Choose the correctly spelt word.

Correct option is C

The correctly spelt word is (c) CONSCIENTIOUS.

Correct word – Conscientious:

• Meaning: Careful, hardworking, and showing a strong sense of duty and responsibility. (Hindi meaning: कर्तव्यनिष्ठ / ज़िम्मेदार)
• Example: She is a conscientious employee who always completes tasks on time.

Why other options are incorrect:

• (a) CONSCIENTOUS: Misses the letter i in “-tious”.
• (b) CONSIENTIOUS: Misses the letter c after “cons”.
• (d) CONCENTIOUS: Incorrect spelling; changes the base structure of the word.

So the correct answer is (c)