Ajay and Vijay are siblings. Ajay can roll his tongue while Vijay cannot. What is the genotype of their parents?

1. Both the parents are homozygous dominant.
2. Both the parents are homozygous recessive.
3. One parent is homozygous dominant, and the other is homozygous recessive.
4. Both the parents are heterozygous dominant.

Assertion (A): Deficiency of Antidiuretic hormone causes an increase in urination.

Reason (R): Antidiuretic hormone acts on the kidney to reabsorb water from the kidney tubules.

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

Assertion (A): Arachnoid layer helps in speeding up the transmission of nerve impulses along the axons.

Reason (R): Axon endings at the synapse secrete acetylene.

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

Many nuclear power plants are constructed near water sources. They use water for cooling their machinery and release it back into the water stream. Identify the kind of pollution caused.

1. Radiation pollution
2. Water pollution
3. Industrial pollution
4. Thermal pollution