Assertion. A metallic shield in the form of a hollow shell, can be built to block an electric field.
Reason. In a hollow spherical shell, the electric field inside is not zero at every point.
A. both, Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. both, Assertion and Reason are true, but Reason is not the correct explanation of the Asserrtion.
C. Assertion is true, but the Reason is false.
D. both, Assertion and Reason are false.