Which of the following statements is correct?
1. Common cold - Droplet Infection.
2. Typhoid - Contaminated food & water.
3. AIDS - Shaking hands.
4. Ringworm - Using infected towels.
(a) 1 and 2
(b) 3 and 4
(c) 1 and 3
(d) 1,2 and 4
(d): Common cold can take place from one person to other as it it a communicable in nature. A healthy person can get infected by being in close vicinity of infected person when he/she sneezes, coughs, as the droplets generted by sneeze and cough contain infecting agents. Typhoid occurs by the intake of contaminated water & food. While ringworm is one of the skin disease which can transfer from one person to other by the use of infected towel & handkerchief. AIDS (Acquired Immuno deficiency) does not occur or transfer by shanking hands.