The sounds of which frequency are human beings most sensitive
(A) 400 hertz
(B) 20 hertz
(C) 20000 hertz
(D) 5000 hertz
What is the common name for the drug acetyl salicylic acid
(A) Paracetamol
(B) Analgin
(C) Aspirin
(D) Penicillin
Which of the following is affected by rickets in the human body
(A) Bones
(B) Tissues
(C) Muscles
(D) Blood
Which vitamin is available to the human body through sun bathing
(A) Vitamin A
(B) Vitamin D
(C) Vitamin K
(D) Vitamin B12