All engineering students should learn mechanics, mathematics and how to do computation.
I II III IV
Which of the above underlined parts of the sentence is not appropriate?
A. I
B. II
C. III
D. IV
GATE 2013 · General Aptitude · Incorrect Sentence Part · medium
Answer: Part IV - 'how to do computation' - is not appropriate. It should be the simple noun 'computation' to maintain parallel structure with 'mechanics' and 'mathematics'.
Identify the list structure after 'learn': The sentence says 'should learn mechanics, mathematics and how to do computation.' The items are: (1) mechanics, (2) mathematics, (3) how to do computation.
Test each option for appropriateness: Part I (All) - correct as a determiner. Part II (engineering students) - correct as the subject. Part III (mechanics, mathematics) - correct as parallel nouns. Part IV (how to do computation) - incorrect because it should simply be 'computation' to match the parallel noun structure.