2.  Excess fluoride in drinking water causes osteoporosis

3.  Excess cadmium in drinking water causes black foot disease

4.  Methyl mercury in water may cause ‘Itai-Itai’ disease

1.  Both assertion and reason are true and reason is the correct explanation of assertion

3.  Assertion is true but reason in false

4.  Both assertion and reason are false

1.  Basal growth

3.  Transverse growth

4.  Vertical growth

1.  Both assertion and reason are true and reason is the correct explanation of assertion

3.  Assertion is true but reason in false

4.  Both assertion and reason are false

1.  sclerotic, choroid and retina

2.  optic, ciliary and iridial

3.  sclerotic,cornea and conjunctiva

1.  Both assertion and reason are true and reason is the correct explanation of assertion

3.  Assertion is true but reason in false

4.  Both assertion and reason are false

2.  Deodar and fern

3.  Wheat and maiden hair fern

4.   Sugarcane and sunflower

1.  Phloem elements that serve as entry points for substance for transport to other plant parts

2.  Testa of seeds to enable emeregence of growing embryonic axis during seed germination

3.  Central region of style through which the pollen tube grows towards the ovary

1.  rods

2.  cones

4.  Both (a) and (b)

1.  Aerobiosis

3.  Psammophytes

4.  Biological magnification