Consider the following statements: Superconductivity in a material can be destroyed by 1. increasing the temperature above a certain limit. 2. applying a magnetic field above a certain limit. 3. passing a current, above a certain limit, through the material. 4. increasing the current to a point above the critical current. Of these the correct statements are:

Consider the following statements: Superconductivity in a material can

1.	Consider the following statements: Superconductivity in a material can be destroyed by 1. increasing the temperature above a certain limit. 2. applying a magnetic field above a certain limit. 3. passing a current, above a certain limit, through the material. 4. increasing the current to a point above the critical current. Of these the correct statements are:
A.	2, 3 and 4
B.	1, 3 and 4
C.	1, 2 and 3
D.	1, 2 and 4
Answer» E.

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