The antiseptic present in tears:

1. Iodine
2. Hydrogen peroxide
3. Lysozyme
4. Lysosome

Assertion (A) : The foetus respires but does not breathe.

Reason (R): The maternal blood supplies oxygen to the foetus through placenta.

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

During ventricular systole, the atrioventricular valves (P) …………… and semilunar valves (Q) …………… .

1. P-close, Q-open
2. P-close, Q-close
3. P-open, Q-close
4. P-open, Q-open

The two cerebral hemispheres are joined by a sheet of fibres called:

1. Pons
2. Corpus luteum
3. Hypothalamus
4. Corpus callosum