Explanation
Let us solve this linear seating arrangement step-by-step by placing the individuals according to the given conditions:
Step 1: Analyze the position of D
Statement: "D left end"
Meaning: D must occupy the absolute leftmost position in our sequence.
Arrangement structure: D,_,_,_
Step 2: Analyze the positions of A and B
Step 3: Analyze the position of C
Final Integration
Now, let us place the combined sequence A→B→C into our layout while respecting that D is anchored firmly at the very beginning on the far left:
Position 1 (Left End) = D
Position 2 = A
Position 3 = B
Position 4 = C
Final Seating Order=DABC
Let's do a quick verify against the conditions:
Is A to the left of B? Yes (A is right next to B's left).
Is C to the right of B? Yes (C is right next to B's right).
Is D at the left end? Yes.
Correct Answer
The correct option is (a) DABC.