Four friends P, Q, R and S were discussing the examples of genetic disorders. The examples they quoted were as follows:

P. Colour blindness and Malaria

Q. Albinism and Cholera

R. Haemophilia and Colour blindness

S. Haemophilia and Albinism

Who gave the correct examples?

1. P and Q
2. R and S
3. P and R
4. Q and S

Osmosis takes place when there is:

1. A freely permeable membrane
2. A cell wall
3. A selectively permeable membrane
4. An impermeable membrane

Assertion (A): Sympathetic nervous system prepares the body for violent action against abnormal conditions.

Reason (R): Sympathetic nervous system accelerates heartbeat.

Which of the following is correct?

1. Both A and R are True
2. A is True, R is False
3. A is False but R is True
4. Both A and R are False

Birth rate is the number of live births per thousand persons in:

1. 1 year
2. 2 years
3. 10 years
4. 20 years