Step 1: Understanding Labov's Martha's Vineyard study.
In his study, Labov found that vowel sounds in Martha's Vineyard underwent a process of centralization, particularly in the diphthongs. This phenomenon involved the shifting of vowel sounds toward a more centralized articulation in the mouth.
Step 2: Evaluating the options.
(A) Vowel diphthongization: Not the main sound change in this study.
(B) Rhoticization: Not involved in Labov's Martha's Vineyard study.
(C) Diphthong centralization: Correct. This is the main sound change observed in the study.
(D) Vowel lengthening: Not the primary focus of the study.
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: