Correct option is A
The correct option to fill in the blank is
(a) to.
Detailed Explanation (English):
• “Indulgent” means being too lenient or too generous towards someone, especially in allowing them to do what they want.
• The correct collocation is
indulgent to a person.
• Hence, “Lalita is very indulgent to her child” is correct.
Correct sentence: Lalita is very indulgent to her child.
Grammatical Rule Used (English):
• Adjective + fixed preposition (collocation): indulgent + to (someone).
Grammatical Rule Used (Hindi):
• “indulgent” के साथ सही preposition
to आता है।
• “indulgent to someone” का अर्थ होता है किसी के प्रति बहुत अधिक ढील/लाड़-प्यार दिखाना।
Meanings of the other options:
• (b) On: used for surface/position; sometimes used in phrasal structures (पर)
• (c) With: used to show association/behaviour towards someone in some contexts (के साथ)
• (d) For: used to show reason/purpose/benefit (के लिए)