Devanagari organizes the consonant graphemes as shown in the image. What is the parameter by which the following two rows differ?

Step 1: Observe Row 1 (velar series).
Sounds are articulated at the velum (back of the tongue against the soft palate).
Examples: /k/, /g/, /ŋ/.
Step 2: Observe Row 2 (bilabial series).
Sounds are articulated with both lips.
Examples: /p/, /b/, /m/.
Step 3: Compare parameters.
- Voicing: Both rows contain voiced and voiceless consonants.
- Aspiration: Both rows include aspirated and unaspirated sounds.
- Manner of articulation: Both rows include stops and a nasal.
- Place of articulation: Row 1 is velar, Row 2 is bilabial.
Thus, the difference is place of articulation.
\[
\boxed{\text{Place of articulation (Option C)}}
\]
Given the following phonological rule, which one of the options CANNOT be an output?

Eight students (P, Q, R, S, T, U, V, and W) are playing musical chairs. The figure indicates their order of position at the start of the game. They play the game by moving forward in a circle in the clockwise direction.
After the 1st round, the 4th student behind P leaves the game.
After the 2nd round, the 5th student behind Q leaves the game.
After the 3rd round, the 3rd student behind V leaves the game.
After the 4th round, the 4th student behind U leaves the game.
Who all are left in the game after the 4th round?

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
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: