Sir,

 

If in an MCQ question all the four given choices are correct. But 4th choice contains rest of the three choices as well (i.e. Ans choices are

a) spontaneous at low temp.

b) spontaneous at high temp.

c)spontaneous at room temp.

d)spontaneous at all temp.

 

In such cases Ans can be-- d) only as it automatically covers other 3 choices or it can be---- a),b),c) & d)

 

What should be marked in the JEE ans. sheet?