Question

Fill in the blank with the most appropriate word.
The _________ discovery of penicillin by Fleming in 1928 made the effective treatment of many bacterial diseases possible.

• A. accidental
• B. by chance
• C. accident
• D. accidentally

Answer 1

The correct option is A accidental

In the given sentence we can understand that the discovery that happened was by accident. Accident is a noun so to describe this discovery we would be using its adjective form. Adjectives can be formed by modifying a noun. These suffixes are: "-ic," "-ical," "-ish," and "-ous." , "-al".The word "photograph" can be transformed into "photographic" simply by adding the suffix. However, some nouns require a change in spelling. In this case, the suffix becomes "-al".

Option A is correct.