The sex of a child before birth can be determined by:

• Amnoscopy
• Amniocentesis
• Amniograpghy
• None of these
Correct Option: B  [ Amniocentesis ]

Remark:

The waves which can propagate even through the vacuum,are called __________.

• Mechanical waves
• Reverse waves
• Inverted waves
• Electromagnetic waves
Correct Option: D  [ Electromagnetic waves ]

Remark:

Which of the following is the heaviest ?

• Proton
• Electron
• Neutron
• Neutrino
Correct Option: A  [ Proton ]

Remark:

The red planet is

• Venus
• Saturn
• Mars
• Neptune
Correct Option: C  [ Mars ]

Remark:

The acid present in the stomach of human beings is:

• HNO₃
• H₂CO₃
• HCl
• H₂SO₄
Correct Option: C  [ HCl ]

Remark:

Which cells in our body are popularly called 'soldiers' of the human body?

• Eosinophils
• White blood cells
• Red blood cells
• Basophils
Correct Option: B  [ White blood cells ]

Remark:

The HIV virus affects the:

• Leucocytes
• Lymphocytes
• Erythrocytes
• None of these
Correct Option: B  [ Lymphocytes ]

Remark: