Correct option is D
The correctly spelt word is (d) unparalleled.
• Correct word – Unparalleled:
Unparalleled means having no parallel or equal; exceptional or unmatched.
(Hindi meaning: अद्वितीय / बेमिसाल)
Example:
The team showed unparalleled dedication throughout the entire championship tournament.
• Details of common spelling errors:
The word is formed by adding the negative prefix 'un-' to the word 'paralleled'. The root word 'parallel' already contains double 'l' in the middle and a single 'l' before the '-ed' suffix, leading to the correct sequence of letters ending with '-leled'.
So the correct answer is (d)