Some of the sentences are grammatically correct and some are incorrect. Find out which part of the sentence has an error and mark that part. If there is no error , mark that part as your answer.
`("Although there is virtually no production in India")/a` `("the 'Encyclopaedia Britannica' estimate")/b` `("that India has perhaps the largest sccumulated stocks of silver in the world")/c` `("No error")/d`

Explanation

(b) Say .estimates.