A ate grapes and pineapple; B ate grapes and oranges; C ate oranges, pineapple and apple; D ate grapes, apple and pineapple. After taking fruits, B and C fell sick. In the light of the above facts, it can be said that the cause of sickness was:

EXPLANATION

Correct Option (4)

Oranges

Individuals B and C fell ill after consuming fruits. The fruits consumed by B were Grapes and Oranges. The fruits consumed by C were Oranges, Pineapple, and Apple. The only fruit common to both B and C is Oranges. Therefore, Oranges are identified as the probable cause of sickness.

Incorrect Options:

Apple: C consumed Apple and fell sick. However, D also consumed Apple but did not fall sick. This indicates Apple is not the sole cause of sickness.
Pineapple: A, C, and D consumed Pineapple. Among these, only C fell sick, while A and D remained healthy. This eliminates Pineapple as the universal cause.
Grapes: A, B, and D consumed Grapes. Only B fell sick, whereas A and D did not. Consequently, Grapes cannot be the exclusive reason for the illness.