Step 1: Define allophones.
Allophones are different phonetic realizations of the same phoneme. They do not create a change in meaning but occur in different phonological environments.
Step 2: Distribution type.
- [p] (unaspirated) and [pʰ] (aspirated) occur in complementary distribution. Example in English:
- [pʰ] occurs at the beginning of stressed syllables (e.g., pin [pʰɪn]).
- [p] occurs after /s/ (e.g., spin [spɪn]).
Thus, they never overlap freely.
Step 3: Restriction.
[pʰ] has more limited distribution (only in certain environments), while [p] has broader occurrence. Therefore, (C) is correct.
Step 4: Elimination.
- (A) Contrastive distribution means minimal pairs with a meaning difference (not true here).
- (D) Interchangeability is not possible without sounding unnatural.
\[
\boxed{\text{Correct Answer: (B) and (C)}}
\]
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: