Step 1: Evil genius hypothesis
  
Descartes imagined an "evil genius" who could deceive him even in matters of logic and mathematics. This radical doubt extended not only to sensory experience but also to apparently indubitable truths like arithmetic.
  
Step 2: Apply to the statements
  
- (II) "The sum of the angles of a triangle is 180 degrees" → A mathematical truth. Under the evil genius hypothesis, even such truths could be doubted.
  
- (VIII) "2+2=4" → The simplest arithmetic truth, yet Descartes shows that the evil genius could make us doubt even this.
  
- Other statements (I, III, IV, V, VI, VII) relate to empirical observation or personal states, not Descartes' focus in the evil genius argument.
  
Step 3: Conclusion
  
Therefore, Descartes' evil genius mainly denies certainty of mathematical/logical truths, i.e., (II) and (VIII).  
\[
\boxed{\text{Correct Answer: (D) II and VIII}}
\]
The 12 musical notes are given as \( C, C^\#, D, D^\#, E, F, F^\#, G, G^\#, A, A^\#, B \). Frequency of each note is \( \sqrt[12]{2} \) times the frequency of the previous note. If the frequency of the note C is 130.8 Hz, then the ratio of frequencies of notes F# and C is:
Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II. 
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate