We need to choose a combination of three statements that are logically consistent and related. Let's examine option (c): ABD
A: Metal is good material for desks.
B: Desks are made of metal.
D: This object is a desk.
Let’s build the logical flow:
From D: This object is a desk.
From B: Desks are made of metal.
\[
\text{So, this object is made of metal.}
\]
From A: Metal is good material for desks — this provides reasoning and supports B.
All three statements relate to the composition and suitability of metal for desks. Hence, ABD is a logically consistent and complete set.
Now check other options:
(a) ADF:
- A and D are fine.
- But F: “This is made of metal.” does not specify what “this” is. No clear linkage.
(b) BCE:
- C: “This object is not a desk” contradicts B and E. Ambiguous and not logically sound.
(d) BDF:
- B: Desks are made of metal.
- D: This object is a desk.
- F: This is made of metal.
It seems logical, but F is vague — what is “this”? Still, not wrong, but lacks the contextual completeness that A provides in ABD.
Conclusion:
ABD gives a complete logical and meaningful connection, from definition (A), through general rule (B), to instance (D).