The following question consists of a set of labelled parts X, Y, and Z of a sentence. Choose the option that gives the most logical order of these parts to form a coherent sentence about a room on the fourth floor of a boarding house.

Introduction / Context:
This question belongs to the sentence reordering or jumbled parts category. A single sentence has been broken into three labelled segments X, Y, and Z, and the candidate must arrange them in a logical order. The sentence describes a room that gave great satisfaction to two boys and mentions its location in a boarding house. Such questions test understanding of sentence structure, grammar, and meaning rather than simple vocabulary.

Given Data / Assumptions:
The unlabelled framework is: “The room which yielded so X the fourth floor of a Y boarding house in Bleecker Street Z much satisfaction to the two boys was on”.
We are told that the parts X, Y, Z must be arranged to create a clear, grammatical sentence. We assume that the intended final sentence is meaningful and describes the satisfaction given by the room and its position on the fourth floor of a boarding house in Bleecker Street.

Concept / Approach:
A correct English sentence about this situation is likely to be: “The room which yielded so much satisfaction to the two boys was on the fourth floor of a boarding house in Bleecker Street.” In this logical version, the phrase following “so” should be “much satisfaction to the two boys was on”, which must belong to one of the labelled parts. Then, after the verb phrase “was on”, the location “the fourth floor of a boarding house in Bleecker Street” must follow in the correct order.

Step-by-Step Solution:
Step 1: Identify where the comparative phrase “so much satisfaction to the two boys was on” should appear. It clearly should follow “which yielded so”. Step 2: From the labelled parts, the one that fits this content is Z, which contains “much satisfaction to the two boys was on”. Step 3: After “was on”, we expect the location of the room: “the fourth floor of a boarding house in Bleecker Street”. Step 4: This location is split into X (“the fourth floor of a”) and Y (“boarding house in Bleecker Street”). Therefore, X must come before Y. Step 5: Putting them together after Z, we get the order Z X Y. Step 6: Hence, the correct sequence forming the complete sentence is ZXY, which corresponds to option (c).

Verification / Alternative check:
Write the full sentence using the chosen order: “The room which yielded so Z much satisfaction to the two boys was on X the fourth floor of a Y boarding house in Bleecker Street.” Substituting Z, X, Y yields: “The room which yielded so much satisfaction to the two boys was on the fourth floor of a boarding house in Bleecker Street.” The sentence is clear, grammatically correct, and semantically complete. Trying other orders such as XZY or YXZ leads to awkward or ungrammatical structures where “so” is not followed by “much satisfaction” in the correct position.

Why Other Options Are Wrong:
XZY would place “the fourth floor of a” immediately after “so”, producing “so the fourth floor of a much satisfaction”, which is ungrammatical.
YXZ would begin the location phrase too early and leave “much satisfaction” in an incorrect position, breaking the sense of the sentence.
ZYX would produce the phrase “on boarding house in Bleecker Street the fourth floor of a”, which is an unnatural order for describing a location.
Only ZXY gives a smooth and logical English sentence.

Common Pitfalls:
Candidates sometimes rely only on the order that “sounds” right without checking clause structure. Another mistake is ignoring how comparative words like “so” usually pair with “much” or “many” immediately after them. Paying attention to fixed patterns such as “so much satisfaction” and usual location phrases like “on the fourth floor of a boarding house in Bleecker Street” makes the correct order much easier to spot.

Final Answer:
The most logical and grammatically correct order of the parts is ZXY.