Choose the word/s wrongly spelt.
(a) LACKADAISICAL
(b) LASCIVIOUS
(c) LIBIDINEOUS
Answer options :

The correct answer is Option A ((c) only).

Key Points:
• Core Language Concept Tested: The question primarily tests the candidate's understanding of standard English Spelling, specifically focusing on advanced, multisyllabic academic vocabulary.
• Why the Correct Option is Right: The official answer key marks option 1 as correct, identifying only (c) as wrongly spelt. This is perfectly accurate. The correct spelling of the word is LIBIDINOUS (meaning showing excessive sexual drive; lustful). The insertion of the extra 'E' before the 'O' makes it incorrect.
• Common Exam Traps and Pitfalls: MPSC often uses words with complex vowel clusters or double consonants to create visual confusion. Words ending in '-eous' (like spontaneous) and '-ous' (like libidinous) are common traps. Candidates unfamiliar with the words might assume all are spelt correctly or incorrectly.
• Elimination of Incorrect Options: Let's verify the others: LACKADAISICAL (lacking enthusiasm and determination) is spelled correctly with 'ai' and 'si'. LASCIVIOUS (feeling or revealing an overt and often offensive sexual desire) is correctly spelled with 'sci' and 'vi'. Therefore, only (c) is flawed. Thus, by process of verification, we arrive safely at the correct choice.
• Preparation Strategy: For future exams, maintain a list of frequently misspelled advanced vocabulary words, paying special attention to suffix rules.
• Key Takeaway: Remember: The correct spelling is 'LIBIDINOUS', without an 'E' before the 'O'.