Assertion (A) : Water is not used as a barometric liquid because it does not stick to the glass surface.

Reason (R) : Barometric liquid should be such that should neither wet nor stick to the glass surface.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

Assertion (A) : A brick exerts maximum pressure on ground when it is placed with its longest side vertical.

Reason (R) : Larger the area on which a given thrust acts, lesser is the pressure exerted by it.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

Assertion (A) : A hydraulic jack is used for squeezing oil out of linseed and cotton seeds.

Reason (R) : It works on the Pascal's principle.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

Write the numerical value of the atmospheric pressure on the surface of the earth in pascal.