Correct option is A
The correct option to fill in the blank is
(a) fire.
The phrase is a commonly used idiom:
"spread like wildfire", which means to spread
very rapidly and widely (तेज़ी से फैलना).
Example: The rumour about the merger spread like fire in the office.
Other options:
· (b)
wind – not idiomatically used in this expression.
· (c)
water – no such common idiom.
· (d)
air – also incorrect; idiomatically, we don’t say “spread like air.”