Read the following Assertion and Reason and choose the correct option. Assertion: Mary Mallon, also known as Typhoid Mary, was a carrier of typhoid fever. Reason: Typhoid carriers can spread the disease through the food they prepare, even if they do not show symptoms themselves.

Step-by-step solution

Many viruses also cause diseases in human beings. Rhino viruses represent one such group of viruses which cause one of the most infectious human ailments – the common cold. They infect the nose and respiratory passage but not the lungs. The common cold is characterised by nasal congestion and discharge, sore throat, hoarseness, cough, headache, tiredness, etc., which usually last for 3-7 days. Droplets resulting from cough or sneezes of an infected person are either inhaled directly or transmitted through contamina