Select the most appropriate option to fill in the blank.
The park is a/an ______ place to stroll and exercise.

Correct option is C

The correct option to fill in the blank is (c) ideal.
Explanation: The word "ideal" means most suitable or perfect for a particular purpose. (आदर्श, उत्तम) It fits the sentence well, implying that the park is perfectly suited for walking and exercising.
Example: This library is an ideal spot for quiet study sessions.
Why other options are incorrect:
· (a) unopen: Not a valid English word.
· (b) doubtful: Means uncertain or suspicious. (संशयास्पद)
· (d) fussy: Means hard to please or overly particular. (चुचपुचा/बहुत चयनशील)