Select the correct passive form of the given sentence. An apple carries about 100 million useful bacteria. (a) About 100 million useful bacteria are being carried by an apple. (b) An apple will carry about 100 million useful bacteria. (c) The useful bacteria to be carried in an apple is about 100 million. (d) About 100 million useful bacteria are carried by an apple.

Options

A. About 100 million useful bacteria are being carried by an apple.
B. An apple will carry about 100 million useful bacteria.
C. The useful bacteria to be carried in an apple is about 100 million.
D. About 100 million useful bacteria are carried by an apple.

Explanation

(d) About 100 million useful bacteria are carried by an apple. (Correct) (a) About 100 million useful bacteria a re being carried by an apple. (Tense has changed) (b) An apple will carry about 100 million useful bacteria. (Incorrect Tense and structure) (c) The useful bacteria to be carried in an apple is about 100 million. (Incorrect words used)