Rearrange the parts of the sentence in correct order. His exact date of birth is not known P but it is believed that he was born in Q late May and later on he decided to celebrate May 29 as his birthday, R as this was the date he climbed Everest.

Introduction / Context:

This question belongs to the sentence rearrangement type where fragments marked P, Q, and R must be arranged to form a grammatically correct and logically coherent sentence. The topic is the unknown exact date of birth of a person who later climbed Mount Everest and chose to celebrate a particular day as his birthday.

Given Data / Assumptions:

• Main clause: His exact date of birth is not known.
• Part P: but it is believed that he was born in
• Part Q: late May and later on he decided to celebrate May 29 as his birthday,
• Part R: as this was the date he climbed Everest
• We assume the final sentence should connect unknown birth date, approximate timing in late May, and the symbolic choice of May 29.

Concept / Approach:

To rearrange correctly, you need to pay attention to conjunctions, pronouns, and logical sequence. The connector but at the beginning of P shows that P must follow the main clause as a contrast. Q continues the belief introduced in P by adding details about late May and the later decision. R explains the reason for choosing May 29 by using the connector as this was. Hence, a natural order emerges from these grammatical signals.

Step-by-Step Solution:

Verification / Alternative check:

Write the full sentence with P Q R in order: His exact date of birth is not known but it is believed that he was born in late May and later on he decided to celebrate May 29 as his birthday, as this was the date he climbed Everest. The sentence now flows smoothly with a clear contrast, time reference, and causal explanation. Other orders either break the grammatical link or produce abrupt and illogical transitions.

Why Other Options Are Wrong:

Option A (P R Q) wrongly places the reason about climbing Everest before the statement about celebrating May 29, making the sentence confusing.

Option C (Q R P) starts with late May without any introduction, which is grammatically incomplete.

Option D (R P Q) begins with a reason clause as this was the date, but the reader does not yet know which date is being referred to.

Common Pitfalls:

Many learners focus only on the story and ignore connectors like but and as. However, these small words are strong clues to order. Another pitfall is trying to memorise patterns instead of reading the parts as if you are writing a real sentence. Always combine logic, grammar, and meaning to find the correct sequence.

Final Answer:

The correct arrangement of parts is P Q R, which is option B.