Which sentence below shows the correct use of a gerund?
A. Conducting scientific experiments can be both fun and dangerous.
B. Scientific experiments can be both fun and dangerous to conduct.
C. The scientific experiments conducted are both fun and dangerous.
D. Any scientific experiment conducted can be both fun and dangerous.
A gerund is a verb that acts as a noun by adding -ing. In the first option conductingends with ing however none of the other sentences contains a verb ending in it. And hence the answer is A.