Correct option is A
The correct substitution is “dry” instead of “drier”. The sentence structure compares two qualities of the bread — it was both “dry” and “stale.” Using “drier” suggests a comparison which is not being made in this context. The intended meaning is to describe the bread’s qualities, not compare its dryness to something else.
Grammatical rule used:When two adjectives describe a noun independently without comparison, their positive forms are used.
Explanation of the grammatical rule in Hindi:जब एक ही वाक्य में किसी संज्ञा (noun) के लिए दो विशेषण (adjectives) प्रयोग हो रहे हों और तुलना न हो रही हो, तो सकारात्मक (positive) रूप का प्रयोग होता है।
Example: The soup was hot and spicy.