Which statement is not correct about oral evidence under the Indian Evidence Act, 1872? Oral evidence must be direct, that is, if it specifies-

• A. such a fact which could be seen, then that evidence must be that of the witness Cho says he saw
• B. of a fact that could be heard, the evidence must be that of the witness who says that he has heard
• C. a fact which could be sensed by any other sense or method, the evidence must be that of the witness who says that he sensed it in that sense or manner
• D. any opinion or other grounds on which that opinion is held, the evidence must be that of the person who heard other persons say about it.