Step 1: Rearranging the sentence as per option (4):
Let’s decode option (4): I - IV - V - II - II
I → the parents
IV → could not teach
V → Hindi
II → when they were in France
Full Sentence:
"The parents could not teach Hindi when they were in France."
Step 2: Confirm grammar and meaning:
Subject: "The parents"
Verb: "could not teach"
Object: "Hindi"
Time clause: "when they were in France"
The sentence is grammatically correct and meaningful.
Hence, the correct answer is (4) I-IV-V-II-II.