Correct option is C
Correct indirect speech: (c)
The youngman told his parents that they would have to adjust to the changing times.
Important changes (highlight):
• “said to” →
told (reporting verb for “said to”)
• “You” (parents) →
they (pronoun changes according to listener)
• “will have to” →
would have to (backshift because reporting verb is past)
Grammatical Rule (English):
• said to + person →
told + person
• Past reporting verb ⇒
will → would
व्याकरणिक नियम (Hindi):
• “said to” का indirect में रूप:
told
• Past reporting verb होने पर
will → would हो जाता है और pronoun श्रोता/वक्ता के अनुसार बदलता है।
Why other options are incorrect:
• (a) structure बहुत awkward/unnatural है (हालाँकि भाव मिलता-जुलता है), standard नहीं।
• (b)
must अर्थ बदल देता है (compulsion/ आदेश), original “have to” का tense shift नहीं दिखता।
• (d) “you” parents के लिए है, इसलिए “he” गलत है।
Hence, option (c) is the correct answer.