A pair of columns containing three phrases each is presented below. Identify the appropriate combinations that can be joined to form grammatically correct and coherent sentences.

COLUMN I	COLUMN II
(a) When the famous chef opened his new restaurant in the city	(d) you must notify the safety officer at once
(b) Clara loves to display her rare awards in the living room	(e) the inexperienced climbers struggled to reach the base camp before sunset
(c) If an unknown agent attempts to persuade you to sign the contract	(f) so that all her guests can admire her achievements

The correct answer is Only (B)- (F) and (C)-(D).

Let's analyze the given phrases from Column I and Column II to determine which pairs form grammatically correct and logically coherent sentences:

1. Pair (B) - (F):
- Phrase (B): "Clara loves to display her rare awards in the living room"
- Phrase (F): "so that all her guests can admire her achievements"
- Combination: "Clara loves to display her rare awards in the living room so that all her guests can admire her achievements."
- Analysis: This combination is grammatically sound and makes complete logical sense. The clause in (F) provides the reason or purpose for the action described in (B).

2. Pair (C) - (D):
- Phrase (C): "If an unknown agent attempts to persuade you to sign the contract"
- Phrase (D): "you must notify the safety officer at once"
- Combination: "If an unknown agent attempts to persuade you to sign the contract, you must notify the safety officer at once."
- Analysis: This combination forms a correct conditional sentence (if-clause + main clause) that is both grammatically precise and logically meaningful.

Checking other combinations:
- Pair (A) - (E): "When the famous chef opened his new restaurant in the city, the inexperienced climbers struggled to reach the base camp before sunset." (This is logically disconnected as opening a restaurant has no context with climbers reaching a base camp).
- Pair (A) - (D) or (C) - (F) do not make contextual or logical sense together.

Therefore, the only valid and coherent sentence combinations are (B)-(F) and (C)-(D).