Match the following:
(P) Tuberculosis (1) Bacterial
(Q) Diphtheria (2) Viral
(R) Yellow fever (3) Toxoids
(S) Malaria (4) Protozoal
| List-I (Diseases) | List-II (Pathogen) |
| (A) Pneumonia | (I) Wuchereria bancrofti |
| (B) Typhoid | (II) Microsporum |
| (C) Ringworm | (III) Salmonella |
| (D) Elephantiasis | (IV) Haemophilus influenzae |

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?