Statement : Many patients suffering from malaria were administered anti-malarial drug for a week. Some of them did not respond to the traditional drug and their condition deteriorated after four days. Which of the following would weaken the ndings mentioned in the above statement ?

Those patients who responded to the traditional drugs and recovered were needed to be given additional doses as they reported relapse of symptoms.

The mosquitoes carrying malaria are found to be resistant to traditional malarial drugs.

Majority of the patients suffering from malaria responded well to the traditional malarial drugs and recovered from the illness.

Many drug companies have stopped manufacturing traditional malarial drugs.

None of these